./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/EvenOdd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/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_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/EvenOdd01-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/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_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/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 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:34:17,400 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:34:17,462 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 23:34:17,467 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:34:17,468 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:34:17,490 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:34:17,490 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:34:17,491 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:34:17,491 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:34:17,492 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:34:17,492 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:34:17,493 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:34:17,494 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:34:17,494 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:34:17,495 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:34:17,495 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:34:17,496 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 23:34:17,496 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:34:17,497 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:34:17,497 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:34:17,497 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:34:17,501 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 23:34:17,501 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:34:17,501 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 23:34:17,502 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:34:17,502 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 23:34:17,502 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:34:17,503 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:34:17,503 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:34:17,503 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:34:17,504 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:34:17,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:34:17,504 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:34:17,505 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:34:17,505 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 23:34:17,505 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:34:17,506 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:34:17,506 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:34:17,506 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:34:17,507 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 23:34:17,507 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:34:17,507 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:34:17,508 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_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc [2023-11-28 23:34:17,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:34:17,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:34:17,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:34:17,755 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:34:17,755 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:34:17,757 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/recursive/EvenOdd01-1.c [2023-11-28 23:34:20,498 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:34:20,659 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:34:20,660 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/sv-benchmarks/c/recursive/EvenOdd01-1.c [2023-11-28 23:34:20,666 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/data/cd403813d/fa2cc59acbd54d33a09334235ca32a33/FLAG58a8c8804 [2023-11-28 23:34:20,680 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/data/cd403813d/fa2cc59acbd54d33a09334235ca32a33 [2023-11-28 23:34:20,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:34:20,684 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:34:20,685 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:34:20,686 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:34:20,689 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:34:20,690 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:34:20" (1/1) ... [2023-11-28 23:34:20,691 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fd21e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:20, skipping insertion in model container [2023-11-28 23:34:20,691 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:34:20" (1/1) ... [2023-11-28 23:34:20,708 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:34:20,835 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_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/sv-benchmarks/c/recursive/EvenOdd01-1.c[975,988] [2023-11-28 23:34:20,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:34:20,847 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:34:20,859 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_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/sv-benchmarks/c/recursive/EvenOdd01-1.c[975,988] [2023-11-28 23:34:20,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:34:20,871 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:34:20,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:20 WrapperNode [2023-11-28 23:34:20,872 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:34:20,872 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:34:20,873 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:34:20,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:34:20,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:20" (1/1) ... [2023-11-28 23:34:20,884 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:20" (1/1) ... [2023-11-28 23:34:20,896 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2023-11-28 23:34:20,897 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:34:20,897 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:34:20,897 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:34:20,897 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:34:20,906 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:20" (1/1) ... [2023-11-28 23:34:20,906 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:20" (1/1) ... [2023-11-28 23:34:20,907 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:20" (1/1) ... [2023-11-28 23:34:20,919 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-28 23:34:20,919 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:20" (1/1) ... [2023-11-28 23:34:20,920 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:20" (1/1) ... [2023-11-28 23:34:20,923 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:20" (1/1) ... [2023-11-28 23:34:20,925 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:20" (1/1) ... [2023-11-28 23:34:20,926 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:20" (1/1) ... [2023-11-28 23:34:20,927 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:20" (1/1) ... [2023-11-28 23:34:20,928 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:34:20,930 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:34:20,930 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:34:20,930 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:34:20,931 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:20" (1/1) ... [2023-11-28 23:34:20,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:34:20,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:34:20,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:34:20,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:34:20,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:34:20,992 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2023-11-28 23:34:20,992 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2023-11-28 23:34:20,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:34:20,992 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2023-11-28 23:34:20,992 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2023-11-28 23:34:20,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:34:20,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:34:21,049 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:34:21,051 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:34:21,165 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:34:21,187 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:34:21,187 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-28 23:34:21,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:34:21 BoogieIcfgContainer [2023-11-28 23:34:21,188 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:34:21,191 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:34:21,191 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:34:21,193 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:34:21,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:34:20" (1/3) ... [2023-11-28 23:34:21,194 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3aa0dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:34:21, skipping insertion in model container [2023-11-28 23:34:21,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:20" (2/3) ... [2023-11-28 23:34:21,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3aa0dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:34:21, skipping insertion in model container [2023-11-28 23:34:21,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:34:21" (3/3) ... [2023-11-28 23:34:21,196 INFO L112 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2023-11-28 23:34:21,211 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:34:21,211 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 23:34:21,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:34:21,257 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;@33f65722, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:34:21,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 23:34:21,260 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-28 23:34:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-28 23:34:21,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:21,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:21,268 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:21,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:21,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1415048223, now seen corresponding path program 1 times [2023-11-28 23:34:21,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:21,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965569782] [2023-11-28 23:34:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:21,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:21,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:34:21,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:34:21,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965569782] [2023-11-28 23:34:21,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965569782] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:34:21,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:34:21,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 23:34:21,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481005519] [2023-11-28 23:34:21,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:34:21,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 23:34:21,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:34:21,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 23:34:21,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-28 23:34:21,939 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-28 23:34:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:34:22,037 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2023-11-28 23:34:22,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 23:34:22,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-28 23:34:22,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:34:22,046 INFO L225 Difference]: With dead ends: 32 [2023-11-28 23:34:22,046 INFO L226 Difference]: Without dead ends: 23 [2023-11-28 23:34:22,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:34:22,052 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:34:22,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 76 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:34:22,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-28 23:34:22,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-28 23:34:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-28 23:34:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-28 23:34:22,086 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2023-11-28 23:34:22,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:34:22,086 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-28 23:34:22,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-28 23:34:22,087 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-28 23:34:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-28 23:34:22,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:22,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:22,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 23:34:22,088 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:22,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:22,089 INFO L85 PathProgramCache]: Analyzing trace with hash -168268323, now seen corresponding path program 1 times [2023-11-28 23:34:22,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:22,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766538532] [2023-11-28 23:34:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:22,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:22,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:22,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:34:22,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:34:22,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766538532] [2023-11-28 23:34:22,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766538532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:34:22,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:34:22,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 23:34:22,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689568301] [2023-11-28 23:34:22,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:34:22,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 23:34:22,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:34:22,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 23:34:22,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:34:22,318 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-28 23:34:22,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:34:22,386 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-11-28 23:34:22,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 23:34:22,387 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-28 23:34:22,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:34:22,388 INFO L225 Difference]: With dead ends: 29 [2023-11-28 23:34:22,388 INFO L226 Difference]: Without dead ends: 25 [2023-11-28 23:34:22,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-28 23:34:22,390 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:34:22,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 90 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:34:22,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-28 23:34:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-11-28 23:34:22,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-28 23:34:22,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-28 23:34:22,397 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 11 [2023-11-28 23:34:22,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:34:22,397 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-28 23:34:22,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-28 23:34:22,398 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-28 23:34:22,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-28 23:34:22,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:22,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:22,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 23:34:22,399 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:22,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:22,400 INFO L85 PathProgramCache]: Analyzing trace with hash 236008797, now seen corresponding path program 1 times [2023-11-28 23:34:22,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:22,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683075143] [2023-11-28 23:34:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:22,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:22,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:22,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:34:22,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:34:22,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683075143] [2023-11-28 23:34:22,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683075143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:34:22,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:34:22,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:34:22,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652280979] [2023-11-28 23:34:22,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:34:22,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:34:22,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:34:22,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:34:22,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:34:22,486 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-28 23:34:22,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:34:22,514 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2023-11-28 23:34:22,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:34:22,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-28 23:34:22,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:34:22,516 INFO L225 Difference]: With dead ends: 37 [2023-11-28 23:34:22,516 INFO L226 Difference]: Without dead ends: 25 [2023-11-28 23:34:22,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:34:22,518 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:34:22,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 62 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:34:22,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-28 23:34:22,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-11-28 23:34:22,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-28 23:34:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-11-28 23:34:22,524 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2023-11-28 23:34:22,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:34:22,525 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-11-28 23:34:22,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-28 23:34:22,525 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-11-28 23:34:22,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-28 23:34:22,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:22,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:22,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 23:34:22,526 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:22,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:22,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1342568457, now seen corresponding path program 1 times [2023-11-28 23:34:22,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:22,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745100793] [2023-11-28 23:34:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:22,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:22,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:22,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:34:22,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:34:22,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745100793] [2023-11-28 23:34:22,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745100793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:34:22,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:34:22,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-28 23:34:22,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619594455] [2023-11-28 23:34:22,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:34:22,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 23:34:22,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:34:22,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 23:34:22,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-28 23:34:22,865 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-28 23:34:22,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:34:22,995 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-11-28 23:34:22,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 23:34:22,995 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-28 23:34:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:34:22,997 INFO L225 Difference]: With dead ends: 32 [2023-11-28 23:34:22,997 INFO L226 Difference]: Without dead ends: 28 [2023-11-28 23:34:22,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-28 23:34:22,999 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:34:23,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 75 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:34:23,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-28 23:34:23,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-11-28 23:34:23,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-28 23:34:23,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-28 23:34:23,007 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2023-11-28 23:34:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:34:23,007 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-28 23:34:23,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-28 23:34:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-28 23:34:23,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-28 23:34:23,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:23,009 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:23,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 23:34:23,009 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:23,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash -246412613, now seen corresponding path program 1 times [2023-11-28 23:34:23,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:23,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484446902] [2023-11-28 23:34:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:23,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:23,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:23,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:23,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:34:23,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:34:23,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484446902] [2023-11-28 23:34:23,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484446902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:34:23,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:34:23,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:34:23,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87685973] [2023-11-28 23:34:23,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:34:23,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:34:23,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:34:23,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:34:23,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:34:23,091 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-28 23:34:23,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:34:23,123 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2023-11-28 23:34:23,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:34:23,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-11-28 23:34:23,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:34:23,125 INFO L225 Difference]: With dead ends: 38 [2023-11-28 23:34:23,125 INFO L226 Difference]: Without dead ends: 26 [2023-11-28 23:34:23,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:34:23,127 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:34:23,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 58 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:34:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-28 23:34:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-28 23:34:23,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-28 23:34:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-11-28 23:34:23,134 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 24 [2023-11-28 23:34:23,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:34:23,135 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-11-28 23:34:23,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-28 23:34:23,135 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-11-28 23:34:23,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-28 23:34:23,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:23,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:23,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 23:34:23,137 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:23,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:23,137 INFO L85 PathProgramCache]: Analyzing trace with hash -962722745, now seen corresponding path program 1 times [2023-11-28 23:34:23,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:23,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520355044] [2023-11-28 23:34:23,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:23,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:23,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:23,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:23,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:34:23,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:34:23,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520355044] [2023-11-28 23:34:23,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520355044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:34:23,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817629204] [2023-11-28 23:34:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:23,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:23,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:34:23,517 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:34:23,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 23:34:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:23,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-28 23:34:23,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:34:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 23:34:23,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:34:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:34:24,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817629204] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:34:24,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:34:24,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 22 [2023-11-28 23:34:24,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182259923] [2023-11-28 23:34:24,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:34:24,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-28 23:34:24,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:34:24,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-28 23:34:24,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2023-11-28 23:34:24,341 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-28 23:34:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:34:24,575 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2023-11-28 23:34:24,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 23:34:24,576 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.8) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 25 [2023-11-28 23:34:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:34:24,577 INFO L225 Difference]: With dead ends: 38 [2023-11-28 23:34:24,578 INFO L226 Difference]: Without dead ends: 34 [2023-11-28 23:34:24,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-11-28 23:34:24,579 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:34:24,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 112 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:34:24,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-28 23:34:24,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2023-11-28 23:34:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-28 23:34:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-11-28 23:34:24,585 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2023-11-28 23:34:24,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:34:24,586 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-11-28 23:34:24,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.8) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-28 23:34:24,586 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-11-28 23:34:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-28 23:34:24,587 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:24,587 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:24,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-28 23:34:24,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:24,791 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:24,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:24,791 INFO L85 PathProgramCache]: Analyzing trace with hash -503357871, now seen corresponding path program 1 times [2023-11-28 23:34:24,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:24,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906495767] [2023-11-28 23:34:24,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:24,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:24,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:25,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:25,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:25,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 23:34:25,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:34:25,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906495767] [2023-11-28 23:34:25,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906495767] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:34:25,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80736903] [2023-11-28 23:34:25,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:25,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:25,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:34:25,177 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:34:25,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 23:34:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:25,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-28 23:34:25,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:34:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-28 23:34:25,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:34:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 23:34:26,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80736903] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:34:26,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:34:26,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 24 [2023-11-28 23:34:26,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384551710] [2023-11-28 23:34:26,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:34:26,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-28 23:34:26,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:34:26,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-28 23:34:26,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2023-11-28 23:34:26,003 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 17 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-28 23:34:26,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:34:26,345 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-11-28 23:34:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 23:34:26,346 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 17 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 32 [2023-11-28 23:34:26,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:34:26,347 INFO L225 Difference]: With dead ends: 44 [2023-11-28 23:34:26,347 INFO L226 Difference]: Without dead ends: 40 [2023-11-28 23:34:26,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2023-11-28 23:34:26,349 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:34:26,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 155 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 23:34:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-28 23:34:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-11-28 23:34:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-28 23:34:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-11-28 23:34:26,355 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 32 [2023-11-28 23:34:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:34:26,355 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-11-28 23:34:26,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 17 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-28 23:34:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-11-28 23:34:26,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-28 23:34:26,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:26,357 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:26,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 23:34:26,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:26,559 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:26,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:26,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1867179313, now seen corresponding path program 2 times [2023-11-28 23:34:26,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:26,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517704726] [2023-11-28 23:34:26,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:26,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:26,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:26,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:26,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:27,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:27,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 23:34:27,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:34:27,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517704726] [2023-11-28 23:34:27,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517704726] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:34:27,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061100575] [2023-11-28 23:34:27,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:34:27,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:27,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:34:27,119 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:34:27,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 23:34:27,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:34:27,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:34:27,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-28 23:34:27,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:34:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-28 23:34:27,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:34:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-28 23:34:28,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061100575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:34:28,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:34:28,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 18] total 28 [2023-11-28 23:34:28,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331204968] [2023-11-28 23:34:28,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:34:28,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-28 23:34:28,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:34:28,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-28 23:34:28,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-11-28 23:34:28,119 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 28 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 20 states have internal predecessors, (46), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2023-11-28 23:34:28,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:34:28,490 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2023-11-28 23:34:28,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-28 23:34:28,490 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 20 states have internal predecessors, (46), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) Word has length 39 [2023-11-28 23:34:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:34:28,492 INFO L225 Difference]: With dead ends: 50 [2023-11-28 23:34:28,492 INFO L226 Difference]: Without dead ends: 46 [2023-11-28 23:34:28,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2023-11-28 23:34:28,494 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:34:28,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 194 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 23:34:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-28 23:34:28,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2023-11-28 23:34:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-28 23:34:28,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-11-28 23:34:28,500 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 39 [2023-11-28 23:34:28,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:34:28,500 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-11-28 23:34:28,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 20 states have internal predecessors, (46), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2023-11-28 23:34:28,501 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-11-28 23:34:28,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-28 23:34:28,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:28,502 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:28,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 23:34:28,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:28,707 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:28,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:28,707 INFO L85 PathProgramCache]: Analyzing trace with hash -2003597525, now seen corresponding path program 2 times [2023-11-28 23:34:28,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:28,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144157004] [2023-11-28 23:34:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:28,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:28,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:28,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:29,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:29,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:29,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:29,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-28 23:34:29,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:34:29,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144157004] [2023-11-28 23:34:29,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144157004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:34:29,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656410154] [2023-11-28 23:34:29,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:34:29,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:29,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:34:29,316 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:34:29,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 23:34:29,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:34:29,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:34:29,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-28 23:34:29,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:34:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-28 23:34:29,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:34:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 23:34:30,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656410154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:34:30,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:34:30,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 21] total 30 [2023-11-28 23:34:30,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509656681] [2023-11-28 23:34:30,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:34:30,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-28 23:34:30,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:34:30,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-28 23:34:30,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2023-11-28 23:34:30,418 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 30 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-11-28 23:34:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:34:30,831 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2023-11-28 23:34:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-28 23:34:30,831 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) Word has length 46 [2023-11-28 23:34:30,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:34:30,832 INFO L225 Difference]: With dead ends: 56 [2023-11-28 23:34:30,832 INFO L226 Difference]: Without dead ends: 52 [2023-11-28 23:34:30,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2023-11-28 23:34:30,834 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:34:30,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 217 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 23:34:30,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-28 23:34:30,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2023-11-28 23:34:30,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-28 23:34:30,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-11-28 23:34:30,841 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 46 [2023-11-28 23:34:30,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:34:30,841 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-11-28 23:34:30,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-11-28 23:34:30,842 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-11-28 23:34:30,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-28 23:34:30,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:30,843 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:30,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 23:34:31,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:31,044 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:31,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:31,044 INFO L85 PathProgramCache]: Analyzing trace with hash -48123749, now seen corresponding path program 3 times [2023-11-28 23:34:31,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:31,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494916325] [2023-11-28 23:34:31,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:31,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:31,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:31,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:31,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:31,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:31,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:31,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:31,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-28 23:34:31,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:34:31,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494916325] [2023-11-28 23:34:31,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494916325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:34:31,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002978923] [2023-11-28 23:34:31,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:34:31,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:31,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:34:31,688 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:34:31,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 23:34:31,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-28 23:34:31,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:34:31,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-28 23:34:31,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:34:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-28 23:34:31,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:34:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-28 23:34:33,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002978923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:34:33,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:34:33,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 24] total 34 [2023-11-28 23:34:33,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893586458] [2023-11-28 23:34:33,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:34:33,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-28 23:34:33,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:34:33,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-28 23:34:33,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 23:34:33,027 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 34 states, 32 states have (on average 1.75) internal successors, (56), 24 states have internal predecessors, (56), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-28 23:34:33,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:34:33,465 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2023-11-28 23:34:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-28 23:34:33,466 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.75) internal successors, (56), 24 states have internal predecessors, (56), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) Word has length 53 [2023-11-28 23:34:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:34:33,467 INFO L225 Difference]: With dead ends: 62 [2023-11-28 23:34:33,467 INFO L226 Difference]: Without dead ends: 58 [2023-11-28 23:34:33,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=2028, Unknown=0, NotChecked=0, Total=2256 [2023-11-28 23:34:33,469 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:34:33,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 251 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 23:34:33,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-28 23:34:33,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2023-11-28 23:34:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-28 23:34:33,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2023-11-28 23:34:33,477 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 53 [2023-11-28 23:34:33,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:34:33,478 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2023-11-28 23:34:33,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.75) internal successors, (56), 24 states have internal predecessors, (56), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-28 23:34:33,478 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2023-11-28 23:34:33,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-28 23:34:33,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:33,480 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:33,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 23:34:33,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 23:34:33,680 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:33,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:33,681 INFO L85 PathProgramCache]: Analyzing trace with hash -2001067387, now seen corresponding path program 3 times [2023-11-28 23:34:33,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:33,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684141237] [2023-11-28 23:34:33,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:33,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:33,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:33,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:34,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:34,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:34,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:34,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:34,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:34,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-28 23:34:34,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:34:34,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684141237] [2023-11-28 23:34:34,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684141237] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:34:34,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972696773] [2023-11-28 23:34:34,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:34:34,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:34,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:34:34,528 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:34:34,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 23:34:34,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-28 23:34:34,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:34:34,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-28 23:34:34,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:34:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-28 23:34:34,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:34:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-28 23:34:35,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972696773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:34:35,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:34:35,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 27] total 36 [2023-11-28 23:34:35,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288183796] [2023-11-28 23:34:35,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:34:35,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-28 23:34:35,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:34:35,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-28 23:34:35,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2023-11-28 23:34:35,919 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 36 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 25 states have internal predecessors, (60), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-11-28 23:34:36,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:34:36,545 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2023-11-28 23:34:36,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-28 23:34:36,546 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 25 states have internal predecessors, (60), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) Word has length 60 [2023-11-28 23:34:36,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:34:36,547 INFO L225 Difference]: With dead ends: 68 [2023-11-28 23:34:36,547 INFO L226 Difference]: Without dead ends: 64 [2023-11-28 23:34:36,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2023-11-28 23:34:36,549 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 29 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:34:36,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 329 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:34:36,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-28 23:34:36,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 44. [2023-11-28 23:34:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-28 23:34:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-11-28 23:34:36,555 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 60 [2023-11-28 23:34:36,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:34:36,556 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-11-28 23:34:36,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 25 states have internal predecessors, (60), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-11-28 23:34:36,556 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-11-28 23:34:36,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-28 23:34:36,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:36,557 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:36,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 23:34:36,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:36,758 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:36,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:36,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1494415739, now seen corresponding path program 4 times [2023-11-28 23:34:36,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:36,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698207479] [2023-11-28 23:34:36,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:36,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:36,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:37,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:37,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:37,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:37,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:37,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:37,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:37,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:37,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-28 23:34:37,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:34:37,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698207479] [2023-11-28 23:34:37,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698207479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:34:37,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139941764] [2023-11-28 23:34:37,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 23:34:37,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:37,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:34:37,732 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:34:37,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 23:34:37,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 23:34:37,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:34:37,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-28 23:34:37,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:34:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-28 23:34:37,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:34:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-28 23:34:39,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139941764] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:34:39,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:34:39,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 30] total 40 [2023-11-28 23:34:39,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699772714] [2023-11-28 23:34:39,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:34:39,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-28 23:34:39,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:34:39,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-28 23:34:39,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1428, Unknown=0, NotChecked=0, Total=1560 [2023-11-28 23:34:39,406 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 40 states, 38 states have (on average 1.736842105263158) internal successors, (66), 28 states have internal predecessors, (66), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2023-11-28 23:34:39,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:34:39,978 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2023-11-28 23:34:39,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-28 23:34:39,978 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.736842105263158) internal successors, (66), 28 states have internal predecessors, (66), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) Word has length 67 [2023-11-28 23:34:39,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:34:39,979 INFO L225 Difference]: With dead ends: 74 [2023-11-28 23:34:39,979 INFO L226 Difference]: Without dead ends: 70 [2023-11-28 23:34:39,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2023-11-28 23:34:39,981 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:34:39,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 400 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:34:39,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-28 23:34:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 47. [2023-11-28 23:34:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-28 23:34:39,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-11-28 23:34:39,986 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 67 [2023-11-28 23:34:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:34:39,986 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-11-28 23:34:39,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.736842105263158) internal successors, (66), 28 states have internal predecessors, (66), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2023-11-28 23:34:39,986 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-11-28 23:34:39,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-28 23:34:39,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:39,988 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:39,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 23:34:40,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:40,191 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:40,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:40,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1411305567, now seen corresponding path program 4 times [2023-11-28 23:34:40,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:40,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191346978] [2023-11-28 23:34:40,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:40,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:40,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:40,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:40,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:40,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:40,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:40,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:41,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:41,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:41,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:41,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-28 23:34:41,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:34:41,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191346978] [2023-11-28 23:34:41,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191346978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:34:41,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80206831] [2023-11-28 23:34:41,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 23:34:41,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:41,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:34:41,257 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:34:41,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 23:34:41,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 23:34:41,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:34:41,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-28 23:34:41,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:34:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-28 23:34:41,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:34:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-28 23:34:43,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80206831] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:34:43,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:34:43,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 33] total 43 [2023-11-28 23:34:43,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126736195] [2023-11-28 23:34:43,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:34:43,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-28 23:34:43,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:34:43,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-28 23:34:43,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1665, Unknown=0, NotChecked=0, Total=1806 [2023-11-28 23:34:43,279 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 43 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 30 states have internal predecessors, (71), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (21), 13 states have call predecessors, (21), 14 states have call successors, (21) [2023-11-28 23:34:43,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:34:43,977 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2023-11-28 23:34:43,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-28 23:34:43,978 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 30 states have internal predecessors, (71), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (21), 13 states have call predecessors, (21), 14 states have call successors, (21) Word has length 74 [2023-11-28 23:34:43,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:34:43,978 INFO L225 Difference]: With dead ends: 80 [2023-11-28 23:34:43,978 INFO L226 Difference]: Without dead ends: 76 [2023-11-28 23:34:43,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=351, Invalid=3681, Unknown=0, NotChecked=0, Total=4032 [2023-11-28 23:34:43,980 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:34:43,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 417 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:34:43,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-28 23:34:43,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 50. [2023-11-28 23:34:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-28 23:34:43,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2023-11-28 23:34:43,986 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 74 [2023-11-28 23:34:43,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:34:43,986 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2023-11-28 23:34:43,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 30 states have internal predecessors, (71), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (21), 13 states have call predecessors, (21), 14 states have call successors, (21) [2023-11-28 23:34:43,987 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2023-11-28 23:34:43,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-28 23:34:43,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:43,987 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:43,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 23:34:44,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:44,188 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:44,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:44,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1222670609, now seen corresponding path program 5 times [2023-11-28 23:34:44,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:44,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354504626] [2023-11-28 23:34:44,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:44,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:44,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:44,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:44,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:44,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:45,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:45,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:45,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:45,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:45,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:45,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:45,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-28 23:34:45,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:34:45,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354504626] [2023-11-28 23:34:45,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354504626] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:34:45,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264284533] [2023-11-28 23:34:45,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 23:34:45,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:45,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:34:45,585 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:34:45,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 23:34:45,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-28 23:34:45,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:34:45,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-28 23:34:45,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:34:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-28 23:34:45,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:34:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-28 23:34:47,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264284533] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:34:47,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:34:47,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 36] total 46 [2023-11-28 23:34:47,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573513989] [2023-11-28 23:34:47,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:34:47,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-28 23:34:47,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:34:47,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-28 23:34:47,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1916, Unknown=0, NotChecked=0, Total=2070 [2023-11-28 23:34:47,740 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 46 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 32 states have internal predecessors, (76), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2023-11-28 23:34:48,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:34:48,421 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2023-11-28 23:34:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-28 23:34:48,421 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 32 states have internal predecessors, (76), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) Word has length 81 [2023-11-28 23:34:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:34:48,422 INFO L225 Difference]: With dead ends: 86 [2023-11-28 23:34:48,422 INFO L226 Difference]: Without dead ends: 82 [2023-11-28 23:34:48,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=382, Invalid=4174, Unknown=0, NotChecked=0, Total=4556 [2023-11-28 23:34:48,424 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:34:48,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 436 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:34:48,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-28 23:34:48,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 53. [2023-11-28 23:34:48,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-28 23:34:48,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2023-11-28 23:34:48,429 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 81 [2023-11-28 23:34:48,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:34:48,429 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2023-11-28 23:34:48,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 32 states have internal predecessors, (76), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2023-11-28 23:34:48,429 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2023-11-28 23:34:48,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-28 23:34:48,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:48,430 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:48,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 23:34:48,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 23:34:48,631 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:48,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:48,631 INFO L85 PathProgramCache]: Analyzing trace with hash 51720377, now seen corresponding path program 5 times [2023-11-28 23:34:48,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:48,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151483410] [2023-11-28 23:34:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:48,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:48,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:48,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:49,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:49,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:49,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:49,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:49,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:49,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:49,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:49,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:49,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:49,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-28 23:34:49,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:34:49,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151483410] [2023-11-28 23:34:49,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151483410] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:34:49,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6527161] [2023-11-28 23:34:49,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 23:34:49,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:49,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:34:49,870 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:34:49,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 23:34:49,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-28 23:34:49,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:34:49,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 104 conjunts are in the unsatisfiable core [2023-11-28 23:34:49,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:34:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-11-28 23:34:50,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:34:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-28 23:34:52,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6527161] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:34:52,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:34:52,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 39] total 48 [2023-11-28 23:34:52,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792795912] [2023-11-28 23:34:52,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:34:52,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-28 23:34:52,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:34:52,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-28 23:34:52,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2097, Unknown=0, NotChecked=0, Total=2256 [2023-11-28 23:34:52,362 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 33 states have internal predecessors, (80), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2023-11-28 23:34:53,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:34:53,372 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2023-11-28 23:34:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-28 23:34:53,373 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 33 states have internal predecessors, (80), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) Word has length 88 [2023-11-28 23:34:53,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:34:53,374 INFO L225 Difference]: With dead ends: 92 [2023-11-28 23:34:53,374 INFO L226 Difference]: Without dead ends: 88 [2023-11-28 23:34:53,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=433, Invalid=4823, Unknown=0, NotChecked=0, Total=5256 [2023-11-28 23:34:53,376 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:34:53,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 601 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 23:34:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-28 23:34:53,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2023-11-28 23:34:53,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-28 23:34:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2023-11-28 23:34:53,383 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 88 [2023-11-28 23:34:53,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:34:53,383 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2023-11-28 23:34:53,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 33 states have internal predecessors, (80), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2023-11-28 23:34:53,384 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2023-11-28 23:34:53,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-28 23:34:53,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:53,385 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:53,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 23:34:53,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 23:34:53,586 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:53,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:53,586 INFO L85 PathProgramCache]: Analyzing trace with hash -170667559, now seen corresponding path program 6 times [2023-11-28 23:34:53,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:53,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077445461] [2023-11-28 23:34:53,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:53,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:53,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:54,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:54,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:54,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:54,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:54,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:54,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:54,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:54,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:54,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:54,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:54,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:55,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-28 23:34:55,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:34:55,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077445461] [2023-11-28 23:34:55,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077445461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:34:55,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36537505] [2023-11-28 23:34:55,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 23:34:55,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:34:55,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:34:55,089 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:34:55,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 23:34:55,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-28 23:34:55,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:34:55,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 112 conjunts are in the unsatisfiable core [2023-11-28 23:34:55,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:34:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-11-28 23:34:55,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:34:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-28 23:34:57,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36537505] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:34:57,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:34:57,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 42] total 52 [2023-11-28 23:34:57,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496922308] [2023-11-28 23:34:57,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:34:57,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-28 23:34:57,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:34:57,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-28 23:34:57,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2476, Unknown=0, NotChecked=0, Total=2652 [2023-11-28 23:34:57,827 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 52 states, 50 states have (on average 1.72) internal successors, (86), 36 states have internal predecessors, (86), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) [2023-11-28 23:34:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:34:58,796 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2023-11-28 23:34:58,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-28 23:34:58,796 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.72) internal successors, (86), 36 states have internal predecessors, (86), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) Word has length 95 [2023-11-28 23:34:58,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:34:58,798 INFO L225 Difference]: With dead ends: 98 [2023-11-28 23:34:58,798 INFO L226 Difference]: Without dead ends: 94 [2023-11-28 23:34:58,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=471, Invalid=5535, Unknown=0, NotChecked=0, Total=6006 [2023-11-28 23:34:58,801 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 53 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:34:58,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 651 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 23:34:58,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-28 23:34:58,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 59. [2023-11-28 23:34:58,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-28 23:34:58,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-11-28 23:34:58,807 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 95 [2023-11-28 23:34:58,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:34:58,808 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-11-28 23:34:58,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.72) internal successors, (86), 36 states have internal predecessors, (86), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) [2023-11-28 23:34:58,808 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-11-28 23:34:58,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-28 23:34:58,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:34:58,809 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:34:58,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-28 23:34:59,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 23:34:59,010 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:34:59,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:34:59,010 INFO L85 PathProgramCache]: Analyzing trace with hash -291970157, now seen corresponding path program 6 times [2023-11-28 23:34:59,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:34:59,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162580452] [2023-11-28 23:34:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:34:59,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:34:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:59,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:34:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:59,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:59,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:59,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:59,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:34:59,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:34:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:00,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:00,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:00,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:00,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:00,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:00,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:00,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:00,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-28 23:35:00,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:35:00,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162580452] [2023-11-28 23:35:00,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162580452] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:35:00,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938410658] [2023-11-28 23:35:00,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 23:35:00,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:35:00,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:35:00,627 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:35:00,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 23:35:00,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-28 23:35:00,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:35:00,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 120 conjunts are in the unsatisfiable core [2023-11-28 23:35:00,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:35:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-11-28 23:35:01,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:35:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-28 23:35:03,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938410658] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:35:03,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:35:03,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 45] total 54 [2023-11-28 23:35:03,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992003174] [2023-11-28 23:35:03,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:35:03,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-28 23:35:03,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:35:03,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-28 23:35:03,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2681, Unknown=0, NotChecked=0, Total=2862 [2023-11-28 23:35:03,776 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 54 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 37 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) [2023-11-28 23:35:04,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:35:04,933 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2023-11-28 23:35:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-28 23:35:04,933 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 37 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) Word has length 102 [2023-11-28 23:35:04,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:35:04,934 INFO L225 Difference]: With dead ends: 104 [2023-11-28 23:35:04,934 INFO L226 Difference]: Without dead ends: 100 [2023-11-28 23:35:04,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=528, Invalid=6278, Unknown=0, NotChecked=0, Total=6806 [2023-11-28 23:35:04,938 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 45 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:35:04,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 574 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 23:35:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-28 23:35:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 62. [2023-11-28 23:35:04,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-28 23:35:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2023-11-28 23:35:04,942 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 102 [2023-11-28 23:35:04,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:35:04,942 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2023-11-28 23:35:04,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 37 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) [2023-11-28 23:35:04,943 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2023-11-28 23:35:04,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-28 23:35:04,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:35:04,943 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:35:04,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-28 23:35:05,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 23:35:05,144 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:35:05,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:35:05,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1832089789, now seen corresponding path program 7 times [2023-11-28 23:35:05,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:35:05,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171809669] [2023-11-28 23:35:05,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:35:05,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:35:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:05,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:35:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:05,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:05,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:05,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:06,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:06,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:06,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:06,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:06,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:06,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:06,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:06,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:06,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:06,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:07,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-11-28 23:35:07,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:35:07,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171809669] [2023-11-28 23:35:07,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171809669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:35:07,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72048895] [2023-11-28 23:35:07,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 23:35:07,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:35:07,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:35:07,098 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:35:07,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 23:35:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:07,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 128 conjunts are in the unsatisfiable core [2023-11-28 23:35:07,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:35:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-11-28 23:35:07,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:35:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-28 23:35:10,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72048895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:35:10,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:35:10,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 48] total 58 [2023-11-28 23:35:10,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013010726] [2023-11-28 23:35:10,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:35:10,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-28 23:35:10,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:35:10,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-28 23:35:10,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3108, Unknown=0, NotChecked=0, Total=3306 [2023-11-28 23:35:10,580 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 58 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 40 states have internal predecessors, (96), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2023-11-28 23:35:11,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:35:11,692 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2023-11-28 23:35:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-28 23:35:11,692 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 40 states have internal predecessors, (96), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) Word has length 109 [2023-11-28 23:35:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:35:11,693 INFO L225 Difference]: With dead ends: 110 [2023-11-28 23:35:11,693 INFO L226 Difference]: Without dead ends: 106 [2023-11-28 23:35:11,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=568, Invalid=7088, Unknown=0, NotChecked=0, Total=7656 [2023-11-28 23:35:11,695 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 67 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:35:11,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 659 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 23:35:11,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-28 23:35:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 65. [2023-11-28 23:35:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-28 23:35:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2023-11-28 23:35:11,700 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 109 [2023-11-28 23:35:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:35:11,701 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2023-11-28 23:35:11,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 40 states have internal predecessors, (96), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2023-11-28 23:35:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2023-11-28 23:35:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-28 23:35:11,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:35:11,702 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:35:11,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 23:35:11,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 23:35:11,903 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:35:11,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:35:11,903 INFO L85 PathProgramCache]: Analyzing trace with hash -900888339, now seen corresponding path program 7 times [2023-11-28 23:35:11,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:35:11,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407065918] [2023-11-28 23:35:11,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:35:11,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:35:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:12,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:35:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:12,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:12,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:12,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:12,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:13,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:13,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:13,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:13,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:13,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:13,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:13,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:13,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:13,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:13,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:13,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-11-28 23:35:13,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:35:13,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407065918] [2023-11-28 23:35:13,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407065918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:35:13,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864620488] [2023-11-28 23:35:13,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 23:35:13,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:35:13,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:35:13,953 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:35:13,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 23:35:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:14,062 WARN L260 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 136 conjunts are in the unsatisfiable core [2023-11-28 23:35:14,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:35:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2023-11-28 23:35:14,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:35:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-28 23:35:17,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864620488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:35:17,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:35:17,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 51] total 61 [2023-11-28 23:35:17,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008736279] [2023-11-28 23:35:17,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:35:17,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-28 23:35:17,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:35:17,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-28 23:35:17,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=3453, Unknown=0, NotChecked=0, Total=3660 [2023-11-28 23:35:17,800 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 61 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 42 states have internal predecessors, (101), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (33), 19 states have call predecessors, (33), 20 states have call successors, (33) [2023-11-28 23:35:19,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:35:19,202 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2023-11-28 23:35:19,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-28 23:35:19,203 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 42 states have internal predecessors, (101), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (33), 19 states have call predecessors, (33), 20 states have call successors, (33) Word has length 116 [2023-11-28 23:35:19,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:35:19,204 INFO L225 Difference]: With dead ends: 116 [2023-11-28 23:35:19,204 INFO L226 Difference]: Without dead ends: 112 [2023-11-28 23:35:19,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=636, Invalid=8106, Unknown=0, NotChecked=0, Total=8742 [2023-11-28 23:35:19,205 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 56 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:35:19,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 908 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 23:35:19,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-28 23:35:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 68. [2023-11-28 23:35:19,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-28 23:35:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2023-11-28 23:35:19,210 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 116 [2023-11-28 23:35:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:35:19,210 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2023-11-28 23:35:19,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 42 states have internal predecessors, (101), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (33), 19 states have call predecessors, (33), 20 states have call successors, (33) [2023-11-28 23:35:19,210 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2023-11-28 23:35:19,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-28 23:35:19,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:35:19,211 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:35:19,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-28 23:35:19,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:35:19,411 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:35:19,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:35:19,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1888205011, now seen corresponding path program 8 times [2023-11-28 23:35:19,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:35:19,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968288272] [2023-11-28 23:35:19,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:35:19,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:35:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:19,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:35:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:19,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:20,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:20,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:20,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:20,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:20,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:20,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:21,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:21,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:21,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:21,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:21,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:21,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:21,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:21,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:21,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-11-28 23:35:21,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:35:21,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968288272] [2023-11-28 23:35:21,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968288272] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:35:21,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948917078] [2023-11-28 23:35:21,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:35:21,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:35:21,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:35:21,788 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:35:21,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 23:35:21,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:35:21,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:35:21,904 WARN L260 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 144 conjunts are in the unsatisfiable core [2023-11-28 23:35:21,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:35:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2023-11-28 23:35:22,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:35:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 368 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-28 23:35:25,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948917078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:35:25,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:35:25,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 54] total 64 [2023-11-28 23:35:25,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64897861] [2023-11-28 23:35:25,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:35:25,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-28 23:35:25,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:35:25,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-28 23:35:25,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=3812, Unknown=0, NotChecked=0, Total=4032 [2023-11-28 23:35:25,992 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 64 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 44 states have internal predecessors, (106), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2023-11-28 23:35:27,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:35:27,308 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2023-11-28 23:35:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-28 23:35:27,308 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 44 states have internal predecessors, (106), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) Word has length 123 [2023-11-28 23:35:27,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:35:27,310 INFO L225 Difference]: With dead ends: 122 [2023-11-28 23:35:27,310 INFO L226 Difference]: Without dead ends: 118 [2023-11-28 23:35:27,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=673, Invalid=8833, Unknown=0, NotChecked=0, Total=9506 [2023-11-28 23:35:27,311 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 77 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:35:27,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 771 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 23:35:27,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-28 23:35:27,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 71. [2023-11-28 23:35:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 49 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-28 23:35:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2023-11-28 23:35:27,316 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 123 [2023-11-28 23:35:27,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:35:27,317 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2023-11-28 23:35:27,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 44 states have internal predecessors, (106), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2023-11-28 23:35:27,317 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2023-11-28 23:35:27,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-28 23:35:27,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:35:27,318 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:35:27,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-28 23:35:27,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:35:27,519 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:35:27,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:35:27,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1048494279, now seen corresponding path program 8 times [2023-11-28 23:35:27,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:35:27,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391308518] [2023-11-28 23:35:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:35:27,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:35:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:27,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:35:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:28,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:28,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:28,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:28,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:28,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:29,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:29,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:29,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:29,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:29,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:29,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:29,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:29,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:29,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:29,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:30,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:30,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-28 23:35:30,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:35:30,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391308518] [2023-11-28 23:35:30,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391308518] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:35:30,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773298347] [2023-11-28 23:35:30,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:35:30,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:35:30,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:35:30,151 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:35:30,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 23:35:30,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:35:30,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:35:30,285 WARN L260 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 152 conjunts are in the unsatisfiable core [2023-11-28 23:35:30,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:35:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-11-28 23:35:30,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:35:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-28 23:35:34,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773298347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:35:34,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:35:34,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 57] total 66 [2023-11-28 23:35:34,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686982843] [2023-11-28 23:35:34,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:35:34,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-28 23:35:34,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:35:34,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-28 23:35:34,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=4065, Unknown=0, NotChecked=0, Total=4290 [2023-11-28 23:35:34,783 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 66 states, 65 states have (on average 1.6923076923076923) internal successors, (110), 45 states have internal predecessors, (110), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) [2023-11-28 23:35:36,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:35:36,385 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2023-11-28 23:35:36,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-28 23:35:36,386 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.6923076923076923) internal successors, (110), 45 states have internal predecessors, (110), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) Word has length 130 [2023-11-28 23:35:36,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:35:36,387 INFO L225 Difference]: With dead ends: 128 [2023-11-28 23:35:36,387 INFO L226 Difference]: Without dead ends: 124 [2023-11-28 23:35:36,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=742, Invalid=9764, Unknown=0, NotChecked=0, Total=10506 [2023-11-28 23:35:36,389 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 25 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1936 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:35:36,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1018 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1936 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 23:35:36,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-28 23:35:36,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 74. [2023-11-28 23:35:36,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.04) internal successors, (52), 51 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (21), 20 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-28 23:35:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2023-11-28 23:35:36,394 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 130 [2023-11-28 23:35:36,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:35:36,394 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2023-11-28 23:35:36,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.6923076923076923) internal successors, (110), 45 states have internal predecessors, (110), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) [2023-11-28 23:35:36,395 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2023-11-28 23:35:36,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-28 23:35:36,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:35:36,396 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:35:36,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-28 23:35:36,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:35:36,596 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:35:36,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:35:36,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1461866089, now seen corresponding path program 9 times [2023-11-28 23:35:36,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:35:36,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846789073] [2023-11-28 23:35:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:35:36,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:35:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:36,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:35:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:37,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:37,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:37,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:37,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:38,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:38,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:38,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:38,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:38,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:38,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:38,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:38,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:38,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:39,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:39,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:39,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:39,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:39,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-11-28 23:35:39,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:35:39,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846789073] [2023-11-28 23:35:39,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846789073] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:35:39,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938530335] [2023-11-28 23:35:39,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:35:39,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:35:39,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:35:39,471 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:35:39,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 23:35:39,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-28 23:35:39,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:35:39,622 WARN L260 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 160 conjunts are in the unsatisfiable core [2023-11-28 23:35:39,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:35:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-11-28 23:35:39,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:35:44,513 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 468 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-28 23:35:44,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938530335] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:35:44,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:35:44,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 60] total 70 [2023-11-28 23:35:44,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922978735] [2023-11-28 23:35:44,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:35:44,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-28 23:35:44,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:35:44,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-28 23:35:44,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=4588, Unknown=0, NotChecked=0, Total=4830 [2023-11-28 23:35:44,516 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 70 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 48 states have internal predecessors, (116), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) [2023-11-28 23:35:46,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:35:46,219 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2023-11-28 23:35:46,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-28 23:35:46,220 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 48 states have internal predecessors, (116), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) Word has length 137 [2023-11-28 23:35:46,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:35:46,221 INFO L225 Difference]: With dead ends: 134 [2023-11-28 23:35:46,221 INFO L226 Difference]: Without dead ends: 130 [2023-11-28 23:35:46,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=786, Invalid=10770, Unknown=0, NotChecked=0, Total=11556 [2023-11-28 23:35:46,224 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 117 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:35:46,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1067 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1890 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 23:35:46,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-28 23:35:46,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 77. [2023-11-28 23:35:46,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 53 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 21 states have return successors, (22), 21 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-28 23:35:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2023-11-28 23:35:46,231 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 137 [2023-11-28 23:35:46,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:35:46,231 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2023-11-28 23:35:46,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 48 states have internal predecessors, (116), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) [2023-11-28 23:35:46,232 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2023-11-28 23:35:46,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-28 23:35:46,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:35:46,233 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:35:46,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-28 23:35:46,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-28 23:35:46,434 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:35:46,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:35:46,434 INFO L85 PathProgramCache]: Analyzing trace with hash 35662625, now seen corresponding path program 9 times [2023-11-28 23:35:46,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:35:46,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406258121] [2023-11-28 23:35:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:35:46,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:35:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:46,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:35:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:47,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:47,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:47,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:47,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:47,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:48,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:48,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:48,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:48,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:48,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:48,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:48,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:48,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:49,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:49,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:49,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:49,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:49,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:49,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 279 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2023-11-28 23:35:49,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:35:49,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406258121] [2023-11-28 23:35:49,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406258121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:35:49,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830086407] [2023-11-28 23:35:49,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:35:49,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:35:49,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:35:49,577 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:35:49,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-28 23:35:49,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-28 23:35:49,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:35:49,747 WARN L260 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 168 conjunts are in the unsatisfiable core [2023-11-28 23:35:49,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:35:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-11-28 23:35:50,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:35:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 522 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-28 23:35:55,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830086407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:35:55,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:35:55,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 63] total 72 [2023-11-28 23:35:55,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59724462] [2023-11-28 23:35:55,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:35:55,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-11-28 23:35:55,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:35:55,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-11-28 23:35:55,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=4865, Unknown=0, NotChecked=0, Total=5112 [2023-11-28 23:35:55,113 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 72 states, 71 states have (on average 1.6901408450704225) internal successors, (120), 49 states have internal predecessors, (120), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (41), 23 states have call predecessors, (41), 23 states have call successors, (41) [2023-11-28 23:35:56,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:35:56,968 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2023-11-28 23:35:56,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-28 23:35:56,968 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.6901408450704225) internal successors, (120), 49 states have internal predecessors, (120), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (41), 23 states have call predecessors, (41), 23 states have call successors, (41) Word has length 144 [2023-11-28 23:35:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:35:56,970 INFO L225 Difference]: With dead ends: 140 [2023-11-28 23:35:56,970 INFO L226 Difference]: Without dead ends: 136 [2023-11-28 23:35:56,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=861, Invalid=11795, Unknown=0, NotChecked=0, Total=12656 [2023-11-28 23:35:56,971 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-28 23:35:56,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 959 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1951 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-28 23:35:56,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-28 23:35:56,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 80. [2023-11-28 23:35:56,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 22 states have return successors, (23), 22 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-28 23:35:56,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2023-11-28 23:35:56,977 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 144 [2023-11-28 23:35:56,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:35:56,978 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2023-11-28 23:35:56,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.6901408450704225) internal successors, (120), 49 states have internal predecessors, (120), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (41), 23 states have call predecessors, (41), 23 states have call successors, (41) [2023-11-28 23:35:56,978 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2023-11-28 23:35:56,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-28 23:35:56,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:35:56,979 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:35:56,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-28 23:35:57,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-28 23:35:57,180 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:35:57,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:35:57,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1044158847, now seen corresponding path program 10 times [2023-11-28 23:35:57,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:35:57,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971909219] [2023-11-28 23:35:57,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:35:57,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:35:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:57,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:35:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:57,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:58,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:58,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:58,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:58,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:59,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:59,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:59,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:59,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:59,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:35:59,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:35:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:00,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:00,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:00,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:00,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:00,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:00,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:00,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:00,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:00,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-11-28 23:36:00,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:00,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971909219] [2023-11-28 23:36:00,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971909219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:36:00,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141590968] [2023-11-28 23:36:00,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 23:36:00,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:36:00,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:36:00,900 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:36:00,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-28 23:36:01,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 23:36:01,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:36:01,082 WARN L260 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 176 conjunts are in the unsatisfiable core [2023-11-28 23:36:01,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:36:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-11-28 23:36:01,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:36:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-28 23:36:07,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141590968] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:36:07,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:36:07,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 66] total 76 [2023-11-28 23:36:07,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838746636] [2023-11-28 23:36:07,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:36:07,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-28 23:36:07,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:07,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-28 23:36:07,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5436, Unknown=0, NotChecked=0, Total=5700 [2023-11-28 23:36:07,044 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 76 states, 74 states have (on average 1.7027027027027026) internal successors, (126), 52 states have internal predecessors, (126), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) [2023-11-28 23:36:08,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:08,869 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2023-11-28 23:36:08,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-28 23:36:08,869 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 74 states have (on average 1.7027027027027026) internal successors, (126), 52 states have internal predecessors, (126), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) Word has length 151 [2023-11-28 23:36:08,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:08,871 INFO L225 Difference]: With dead ends: 146 [2023-11-28 23:36:08,871 INFO L226 Difference]: Without dead ends: 142 [2023-11-28 23:36:08,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=907, Invalid=12899, Unknown=0, NotChecked=0, Total=13806 [2023-11-28 23:36:08,872 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 157 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:08,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 1084 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1970 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 23:36:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-28 23:36:08,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 83. [2023-11-28 23:36:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 23 states have return successors, (24), 23 states have call predecessors, (24), 3 states have call successors, (24) [2023-11-28 23:36:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2023-11-28 23:36:08,878 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 151 [2023-11-28 23:36:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:08,878 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2023-11-28 23:36:08,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 74 states have (on average 1.7027027027027026) internal successors, (126), 52 states have internal predecessors, (126), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) [2023-11-28 23:36:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2023-11-28 23:36:08,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-28 23:36:08,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:08,879 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:08,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-28 23:36:09,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-28 23:36:09,080 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:09,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:09,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1959618555, now seen corresponding path program 10 times [2023-11-28 23:36:09,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:09,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999489121] [2023-11-28 23:36:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:09,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:09,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:36:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:09,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:10,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:10,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:10,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:10,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:11,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:11,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:11,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:11,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:11,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:11,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:12,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:12,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:12,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:12,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:12,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:12,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:12,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:12,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:12,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:13,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 340 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2023-11-28 23:36:13,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:13,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999489121] [2023-11-28 23:36:13,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999489121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:36:13,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649113254] [2023-11-28 23:36:13,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 23:36:13,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:36:13,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:36:13,106 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:36:13,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-28 23:36:13,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 23:36:13,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:36:13,309 WARN L260 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 184 conjunts are in the unsatisfiable core [2023-11-28 23:36:13,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:36:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2023-11-28 23:36:13,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:36:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 640 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-28 23:36:20,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649113254] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:36:20,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:36:20,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 69] total 78 [2023-11-28 23:36:20,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88386711] [2023-11-28 23:36:20,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:36:20,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-11-28 23:36:20,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:20,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-11-28 23:36:20,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=5737, Unknown=0, NotChecked=0, Total=6006 [2023-11-28 23:36:20,059 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 78 states, 77 states have (on average 1.6883116883116882) internal successors, (130), 53 states have internal predecessors, (130), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) [2023-11-28 23:36:22,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:22,420 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2023-11-28 23:36:22,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-28 23:36:22,421 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.6883116883116882) internal successors, (130), 53 states have internal predecessors, (130), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) Word has length 158 [2023-11-28 23:36:22,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:22,422 INFO L225 Difference]: With dead ends: 152 [2023-11-28 23:36:22,422 INFO L226 Difference]: Without dead ends: 148 [2023-11-28 23:36:22,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=988, Invalid=14018, Unknown=0, NotChecked=0, Total=15006 [2023-11-28 23:36:22,424 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 55 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 3023 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 3040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 3023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:22,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1575 Invalid, 3040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 3023 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-28 23:36:22,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-28 23:36:22,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 86. [2023-11-28 23:36:22,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 24 states have return successors, (25), 24 states have call predecessors, (25), 3 states have call successors, (25) [2023-11-28 23:36:22,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2023-11-28 23:36:22,429 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 158 [2023-11-28 23:36:22,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:22,429 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2023-11-28 23:36:22,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.6883116883116882) internal successors, (130), 53 states have internal predecessors, (130), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) [2023-11-28 23:36:22,430 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2023-11-28 23:36:22,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-28 23:36:22,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:22,431 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:22,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-28 23:36:22,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-28 23:36:22,631 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:22,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:22,631 INFO L85 PathProgramCache]: Analyzing trace with hash -863500821, now seen corresponding path program 11 times [2023-11-28 23:36:22,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:22,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039683057] [2023-11-28 23:36:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:22,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:23,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:36:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:23,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:23,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:23,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:24,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:24,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:24,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:24,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:25,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:25,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:25,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:25,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:25,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:25,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:26,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:26,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:26,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:26,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:26,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:26,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:26,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:26,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:26,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 374 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2023-11-28 23:36:26,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:26,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039683057] [2023-11-28 23:36:26,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039683057] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:36:26,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120839616] [2023-11-28 23:36:26,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 23:36:26,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:36:26,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:36:26,926 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:36:26,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-28 23:36:27,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-28 23:36:27,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:36:27,152 WARN L260 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 192 conjunts are in the unsatisfiable core [2023-11-28 23:36:27,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:36:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2023-11-28 23:36:27,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:36:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 704 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-11-28 23:36:34,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120839616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:36:34,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:36:34,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 72] total 82 [2023-11-28 23:36:34,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963391450] [2023-11-28 23:36:34,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:36:34,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-11-28 23:36:34,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:34,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-11-28 23:36:34,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=6356, Unknown=0, NotChecked=0, Total=6642 [2023-11-28 23:36:34,354 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 82 states, 80 states have (on average 1.7) internal successors, (136), 56 states have internal predecessors, (136), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) [2023-11-28 23:36:36,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:36,730 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2023-11-28 23:36:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-28 23:36:36,731 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 80 states have (on average 1.7) internal successors, (136), 56 states have internal predecessors, (136), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) Word has length 165 [2023-11-28 23:36:36,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:36,732 INFO L225 Difference]: With dead ends: 158 [2023-11-28 23:36:36,732 INFO L226 Difference]: Without dead ends: 154 [2023-11-28 23:36:36,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1036, Invalid=15220, Unknown=0, NotChecked=0, Total=16256 [2023-11-28 23:36:36,734 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 201 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 2725 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 2866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:36,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 1479 Invalid, 2866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2725 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-28 23:36:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-28 23:36:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 89. [2023-11-28 23:36:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 61 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 25 states have return successors, (26), 25 states have call predecessors, (26), 3 states have call successors, (26) [2023-11-28 23:36:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2023-11-28 23:36:36,740 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 165 [2023-11-28 23:36:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:36,740 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2023-11-28 23:36:36,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 80 states have (on average 1.7) internal successors, (136), 56 states have internal predecessors, (136), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) [2023-11-28 23:36:36,740 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2023-11-28 23:36:36,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-28 23:36:36,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:36,741 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:36,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-28 23:36:36,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-28 23:36:36,941 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:36,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:36,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1194715307, now seen corresponding path program 11 times [2023-11-28 23:36:36,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:36,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438216288] [2023-11-28 23:36:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:36,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:37,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:36:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:37,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:38,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:38,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:38,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:39,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:39,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:39,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:40,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:40,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:40,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:40,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:40,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:40,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:41,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:41,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:41,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:41,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:41,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:41,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:41,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:41,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:41,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:42,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-11-28 23:36:42,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:42,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438216288] [2023-11-28 23:36:42,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438216288] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:36:42,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901050156] [2023-11-28 23:36:42,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 23:36:42,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:36:42,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:36:42,180 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:36:42,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-28 23:36:42,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-28 23:36:42,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:36:42,424 WARN L260 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 200 conjunts are in the unsatisfiable core [2023-11-28 23:36:42,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:36:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2023-11-28 23:36:42,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:36:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-28 23:36:50,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901050156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:36:50,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:36:50,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 75] total 84 [2023-11-28 23:36:50,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738615918] [2023-11-28 23:36:50,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:36:50,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-11-28 23:36:50,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:50,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-11-28 23:36:50,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=6681, Unknown=0, NotChecked=0, Total=6972 [2023-11-28 23:36:50,059 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 84 states, 83 states have (on average 1.6867469879518073) internal successors, (140), 57 states have internal predecessors, (140), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) [2023-11-28 23:36:52,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:52,637 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2023-11-28 23:36:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-28 23:36:52,637 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.6867469879518073) internal successors, (140), 57 states have internal predecessors, (140), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) Word has length 172 [2023-11-28 23:36:52,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:52,638 INFO L225 Difference]: With dead ends: 164 [2023-11-28 23:36:52,638 INFO L226 Difference]: Without dead ends: 160 [2023-11-28 23:36:52,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1123, Invalid=16433, Unknown=0, NotChecked=0, Total=17556 [2023-11-28 23:36:52,639 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 3020 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 3030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:52,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1476 Invalid, 3030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3020 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-28 23:36:52,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-28 23:36:52,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 92. [2023-11-28 23:36:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 62 states have (on average 1.032258064516129) internal successors, (64), 63 states have internal predecessors, (64), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 26 states have call predecessors, (27), 3 states have call successors, (27) [2023-11-28 23:36:52,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2023-11-28 23:36:52,643 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 172 [2023-11-28 23:36:52,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:52,644 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2023-11-28 23:36:52,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 1.6867469879518073) internal successors, (140), 57 states have internal predecessors, (140), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) [2023-11-28 23:36:52,644 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2023-11-28 23:36:52,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-28 23:36:52,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:52,645 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:52,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-28 23:36:52,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-28 23:36:52,845 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:52,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:52,846 INFO L85 PathProgramCache]: Analyzing trace with hash 892743637, now seen corresponding path program 12 times [2023-11-28 23:36:52,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:52,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334995323] [2023-11-28 23:36:52,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:52,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:53,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:36:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:53,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:54,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:54,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:55,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:55,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:55,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:55,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:56,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:56,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:56,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:56,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:57,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:57,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:57,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:57,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:57,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:57,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:57,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:57,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:58,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:58,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:58,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:58,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:58,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:36:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-11-28 23:36:58,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:58,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334995323] [2023-11-28 23:36:58,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334995323] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:36:58,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029197272] [2023-11-28 23:36:58,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 23:36:58,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:36:58,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:36:58,482 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:36:58,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-28 23:36:58,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-28 23:36:58,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:36:58,843 WARN L260 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 208 conjunts are in the unsatisfiable core [2023-11-28 23:36:58,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:36:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2023-11-28 23:36:59,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:37:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 840 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-28 23:37:07,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029197272] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:37:07,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:37:07,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 78] total 88 [2023-11-28 23:37:07,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018831582] [2023-11-28 23:37:07,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:37:07,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-11-28 23:37:07,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:37:07,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-11-28 23:37:07,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=7348, Unknown=0, NotChecked=0, Total=7656 [2023-11-28 23:37:07,229 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 88 states, 86 states have (on average 1.697674418604651) internal successors, (146), 60 states have internal predecessors, (146), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) [2023-11-28 23:37:09,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:37:09,905 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2023-11-28 23:37:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-28 23:37:09,905 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 86 states have (on average 1.697674418604651) internal successors, (146), 60 states have internal predecessors, (146), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) Word has length 179 [2023-11-28 23:37:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:37:09,907 INFO L225 Difference]: With dead ends: 170 [2023-11-28 23:37:09,907 INFO L226 Difference]: Without dead ends: 166 [2023-11-28 23:37:09,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1173, Invalid=17733, Unknown=0, NotChecked=0, Total=18906 [2023-11-28 23:37:09,909 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 63 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 3065 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 3085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:37:09,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 1674 Invalid, 3085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 3065 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-28 23:37:09,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-28 23:37:09,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 95. [2023-11-28 23:37:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 3 states have call successors, (3), 2 states have call predecessors, (3), 27 states have return successors, (28), 27 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-28 23:37:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2023-11-28 23:37:09,913 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 179 [2023-11-28 23:37:09,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:37:09,913 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2023-11-28 23:37:09,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 86 states have (on average 1.697674418604651) internal successors, (146), 60 states have internal predecessors, (146), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) [2023-11-28 23:37:09,913 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2023-11-28 23:37:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-11-28 23:37:09,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:37:09,914 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:37:09,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-28 23:37:10,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-28 23:37:10,115 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:37:10,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:37:10,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1291966767, now seen corresponding path program 12 times [2023-11-28 23:37:10,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:37:10,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521186708] [2023-11-28 23:37:10,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:10,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:37:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:10,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:37:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:11,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:11,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:12,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:12,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:12,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:13,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:13,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:13,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:14,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:14,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:14,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:14,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:15,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:15,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:15,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:15,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:15,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:15,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:15,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:16,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:16,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:16,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:16,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:16,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:16,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:37:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 480 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2023-11-28 23:37:16,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:37:16,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521186708] [2023-11-28 23:37:16,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521186708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:37:16,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790945677] [2023-11-28 23:37:16,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 23:37:16,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:37:16,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:37:16,670 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:37:16,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-28 23:37:17,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-28 23:37:17,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:37:17,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 164 conjunts are in the unsatisfiable core [2023-11-28 23:37:17,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:37:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-11-28 23:37:20,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:39:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-11-28 23:39:00,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790945677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:39:00,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:39:00,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 81] total 191 [2023-11-28 23:39:00,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675925572] [2023-11-28 23:39:00,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:39:00,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2023-11-28 23:39:00,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:39:00,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2023-11-28 23:39:00,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=790, Invalid=35500, Unknown=0, NotChecked=0, Total=36290 [2023-11-28 23:39:00,175 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 191 states, 190 states have (on average 1.3210526315789475) internal successors, (251), 113 states have internal predecessors, (251), 29 states have call successors, (29), 1 states have call predecessors, (29), 78 states have return successors, (78), 78 states have call predecessors, (78), 29 states have call successors, (78) [2023-11-28 23:39:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:39:05,999 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2023-11-28 23:39:05,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-28 23:39:05,999 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 190 states have (on average 1.3210526315789475) internal successors, (251), 113 states have internal predecessors, (251), 29 states have call successors, (29), 1 states have call predecessors, (29), 78 states have return successors, (78), 78 states have call predecessors, (78), 29 states have call successors, (78) Word has length 186 [2023-11-28 23:39:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:39:06,001 INFO L225 Difference]: With dead ends: 176 [2023-11-28 23:39:06,001 INFO L226 Difference]: Without dead ends: 172 [2023-11-28 23:39:06,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12072 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1820, Invalid=57472, Unknown=0, NotChecked=0, Total=59292 [2023-11-28 23:39:06,004 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 3497 mSDsCounter, 0 mSdLazyCounter, 6970 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 3533 SdHoareTripleChecker+Invalid, 6985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 6970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:39:06,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 3533 Invalid, 6985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 6970 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-28 23:39:06,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-28 23:39:06,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 98. [2023-11-28 23:39:06,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 67 states have internal predecessors, (68), 3 states have call successors, (3), 2 states have call predecessors, (3), 28 states have return successors, (29), 28 states have call predecessors, (29), 3 states have call successors, (29) [2023-11-28 23:39:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2023-11-28 23:39:06,009 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 186 [2023-11-28 23:39:06,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:39:06,009 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2023-11-28 23:39:06,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 190 states have (on average 1.3210526315789475) internal successors, (251), 113 states have internal predecessors, (251), 29 states have call successors, (29), 1 states have call predecessors, (29), 78 states have return successors, (78), 78 states have call predecessors, (78), 29 states have call successors, (78) [2023-11-28 23:39:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2023-11-28 23:39:06,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-28 23:39:06,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:39:06,010 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:39:06,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-28 23:39:06,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-28 23:39:06,211 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:39:06,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:39:06,211 INFO L85 PathProgramCache]: Analyzing trace with hash -880769985, now seen corresponding path program 13 times [2023-11-28 23:39:06,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:39:06,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406215280] [2023-11-28 23:39:06,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:39:06,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:39:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:06,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:39:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:07,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:07,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:08,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:08,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:08,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:09,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:09,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:09,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:09,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:10,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:10,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:10,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:10,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:11,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:11,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:11,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:11,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:11,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:11,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:11,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:12,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:12,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:12,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:12,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:12,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:12,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 520 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2023-11-28 23:39:12,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:39:12,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406215280] [2023-11-28 23:39:12,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406215280] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:39:12,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981424941] [2023-11-28 23:39:12,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 23:39:12,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:39:12,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:39:12,641 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:39:12,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-28 23:39:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:13,545 WARN L260 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 224 conjunts are in the unsatisfiable core [2023-11-28 23:39:13,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:39:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2023-11-28 23:39:13,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:39:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 988 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2023-11-28 23:39:22,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981424941] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:39:22,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:39:22,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 84] total 94 [2023-11-28 23:39:22,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197925864] [2023-11-28 23:39:22,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:39:22,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-11-28 23:39:22,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:39:22,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-11-28 23:39:22,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=8412, Unknown=0, NotChecked=0, Total=8742 [2023-11-28 23:39:22,962 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 94 states, 92 states have (on average 1.6956521739130435) internal successors, (156), 64 states have internal predecessors, (156), 31 states have call successors, (31), 1 states have call predecessors, (31), 28 states have return successors, (55), 30 states have call predecessors, (55), 31 states have call successors, (55) [2023-11-28 23:39:25,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:39:25,998 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2023-11-28 23:39:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-28 23:39:25,998 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 92 states have (on average 1.6956521739130435) internal successors, (156), 64 states have internal predecessors, (156), 31 states have call successors, (31), 1 states have call predecessors, (31), 28 states have return successors, (55), 30 states have call predecessors, (55), 31 states have call successors, (55) Word has length 193 [2023-11-28 23:39:25,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:39:26,000 INFO L225 Difference]: With dead ends: 182 [2023-11-28 23:39:26,000 INFO L226 Difference]: Without dead ends: 178 [2023-11-28 23:39:26,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2372 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1318, Invalid=20438, Unknown=0, NotChecked=0, Total=21756 [2023-11-28 23:39:26,003 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 210 mSDsluCounter, 1862 mSDsCounter, 0 mSdLazyCounter, 3687 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 3857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 3687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:39:26,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 1899 Invalid, 3857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 3687 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-28 23:39:26,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-28 23:39:26,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 101. [2023-11-28 23:39:26,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 69 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 29 states have return successors, (30), 29 states have call predecessors, (30), 3 states have call successors, (30) [2023-11-28 23:39:26,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2023-11-28 23:39:26,009 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 193 [2023-11-28 23:39:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:39:26,010 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2023-11-28 23:39:26,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 92 states have (on average 1.6956521739130435) internal successors, (156), 64 states have internal predecessors, (156), 31 states have call successors, (31), 1 states have call predecessors, (31), 28 states have return successors, (55), 30 states have call predecessors, (55), 31 states have call successors, (55) [2023-11-28 23:39:26,010 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2023-11-28 23:39:26,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-28 23:39:26,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:39:26,011 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:39:26,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-28 23:39:26,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:39:26,212 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:39:26,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:39:26,212 INFO L85 PathProgramCache]: Analyzing trace with hash 654855561, now seen corresponding path program 13 times [2023-11-28 23:39:26,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:39:26,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216024737] [2023-11-28 23:39:26,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:39:26,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:39:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:26,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:39:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:27,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:27,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:28,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:28,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:28,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:29,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:29,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:29,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:30,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:30,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:30,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:30,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:31,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:31,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:31,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:31,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:31,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:31,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:32,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:32,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:32,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:32,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:32,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:32,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:32,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:32,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:32,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2023-11-28 23:39:33,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:39:33,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216024737] [2023-11-28 23:39:33,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216024737] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:39:33,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257266099] [2023-11-28 23:39:33,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 23:39:33,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:39:33,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:39:33,037 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:39:33,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-28 23:39:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:33,991 WARN L260 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 232 conjunts are in the unsatisfiable core [2023-11-28 23:39:33,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:39:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-11-28 23:39:34,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:39:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 1066 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2023-11-28 23:39:44,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257266099] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:39:44,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:39:44,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 87] total 96 [2023-11-28 23:39:44,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200951828] [2023-11-28 23:39:44,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:39:44,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-28 23:39:44,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:39:44,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-28 23:39:44,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=8785, Unknown=0, NotChecked=0, Total=9120 [2023-11-28 23:39:44,306 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 96 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 65 states have internal predecessors, (160), 31 states have call successors, (31), 1 states have call predecessors, (31), 29 states have return successors, (57), 31 states have call predecessors, (57), 31 states have call successors, (57) [2023-11-28 23:39:47,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:39:47,687 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2023-11-28 23:39:47,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-28 23:39:47,687 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 65 states have internal predecessors, (160), 31 states have call successors, (31), 1 states have call predecessors, (31), 29 states have return successors, (57), 31 states have call predecessors, (57), 31 states have call successors, (57) Word has length 200 [2023-11-28 23:39:47,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:39:47,688 INFO L225 Difference]: With dead ends: 188 [2023-11-28 23:39:47,689 INFO L226 Difference]: Without dead ends: 184 [2023-11-28 23:39:47,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1417, Invalid=21839, Unknown=0, NotChecked=0, Total=23256 [2023-11-28 23:39:47,691 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 58 mSDsluCounter, 1978 mSDsCounter, 0 mSdLazyCounter, 4040 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 4059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 4040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:39:47,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 2016 Invalid, 4059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 4040 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-28 23:39:47,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-28 23:39:47,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 104. [2023-11-28 23:39:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 71 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 30 states have return successors, (31), 30 states have call predecessors, (31), 3 states have call successors, (31) [2023-11-28 23:39:47,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2023-11-28 23:39:47,695 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 200 [2023-11-28 23:39:47,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:39:47,696 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2023-11-28 23:39:47,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 65 states have internal predecessors, (160), 31 states have call successors, (31), 1 states have call predecessors, (31), 29 states have return successors, (57), 31 states have call predecessors, (57), 31 states have call successors, (57) [2023-11-28 23:39:47,696 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2023-11-28 23:39:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-28 23:39:47,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:39:47,697 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:39:47,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-28 23:39:47,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:39:47,897 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:39:47,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:39:47,899 INFO L85 PathProgramCache]: Analyzing trace with hash 750887721, now seen corresponding path program 14 times [2023-11-28 23:39:47,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:39:47,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264001192] [2023-11-28 23:39:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:39:47,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:39:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:48,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:39:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:49,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:49,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:49,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:50,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:50,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:51,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:51,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:51,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:52,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:52,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:52,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:52,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:53,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:53,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:53,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:53,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:53,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:54,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:54,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:54,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:54,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:54,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:54,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:54,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:54,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:55,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:55,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:55,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:39:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:39:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2023-11-28 23:39:55,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:39:55,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264001192] [2023-11-28 23:39:55,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264001192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:39:55,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517960305] [2023-11-28 23:39:55,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:39:55,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:39:55,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:39:55,380 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:39:55,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-28 23:39:56,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:39:56,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:39:56,398 WARN L260 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 240 conjunts are in the unsatisfiable core [2023-11-28 23:39:56,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:39:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2023-11-28 23:39:56,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:40:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1148 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-28 23:40:06,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517960305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:40:06,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:40:06,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 90] total 100 [2023-11-28 23:40:06,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4558288] [2023-11-28 23:40:06,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:40:06,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-11-28 23:40:06,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:06,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-11-28 23:40:06,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=9548, Unknown=0, NotChecked=0, Total=9900 [2023-11-28 23:40:06,458 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 100 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 68 states have internal predecessors, (166), 33 states have call successors, (33), 1 states have call predecessors, (33), 30 states have return successors, (59), 32 states have call predecessors, (59), 33 states have call successors, (59) [2023-11-28 23:40:09,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:09,745 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2023-11-28 23:40:09,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-28 23:40:09,746 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 68 states have internal predecessors, (166), 33 states have call successors, (33), 1 states have call predecessors, (33), 30 states have return successors, (59), 32 states have call predecessors, (59), 33 states have call successors, (59) Word has length 207 [2023-11-28 23:40:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:09,747 INFO L225 Difference]: With dead ends: 194 [2023-11-28 23:40:09,747 INFO L226 Difference]: Without dead ends: 190 [2023-11-28 23:40:09,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1471, Invalid=23335, Unknown=0, NotChecked=0, Total=24806 [2023-11-28 23:40:09,749 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 237 mSDsluCounter, 1879 mSDsCounter, 0 mSdLazyCounter, 3764 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 3939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 3764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:09,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 1918 Invalid, 3939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 3764 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-28 23:40:09,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-28 23:40:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 107. [2023-11-28 23:40:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 73 states have internal predecessors, (74), 3 states have call successors, (3), 2 states have call predecessors, (3), 31 states have return successors, (32), 31 states have call predecessors, (32), 3 states have call successors, (32) [2023-11-28 23:40:09,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2023-11-28 23:40:09,753 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 207 [2023-11-28 23:40:09,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:09,753 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2023-11-28 23:40:09,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 68 states have internal predecessors, (166), 33 states have call successors, (33), 1 states have call predecessors, (33), 30 states have return successors, (59), 32 states have call predecessors, (59), 33 states have call successors, (59) [2023-11-28 23:40:09,754 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2023-11-28 23:40:09,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-11-28 23:40:09,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:09,755 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:09,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-28 23:40:09,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-28 23:40:09,955 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:09,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:09,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1293489251, now seen corresponding path program 14 times [2023-11-28 23:40:09,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:09,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484945261] [2023-11-28 23:40:09,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:09,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:10,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:40:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:11,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:11,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:12,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:12,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:12,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:13,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:13,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:14,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:14,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:14,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:14,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:15,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:15,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:15,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:15,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:16,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:16,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:16,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:16,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:16,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:16,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:17,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:17,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:17,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:17,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:17,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:17,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:17,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:17,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 644 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2023-11-28 23:40:17,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:17,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484945261] [2023-11-28 23:40:17,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484945261] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:40:17,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778076504] [2023-11-28 23:40:17,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:40:17,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:17,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:17,914 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:17,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-28 23:40:18,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:40:18,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:40:18,865 WARN L260 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 248 conjunts are in the unsatisfiable core [2023-11-28 23:40:18,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2023-11-28 23:40:19,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:40:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 1232 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-28 23:40:29,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778076504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:40:29,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:40:29,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 93] total 102 [2023-11-28 23:40:29,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611704420] [2023-11-28 23:40:29,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:40:29,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-11-28 23:40:29,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:29,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-11-28 23:40:29,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=9945, Unknown=0, NotChecked=0, Total=10302 [2023-11-28 23:40:29,965 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand has 102 states, 101 states have (on average 1.683168316831683) internal successors, (170), 69 states have internal predecessors, (170), 33 states have call successors, (33), 1 states have call predecessors, (33), 31 states have return successors, (61), 33 states have call predecessors, (61), 33 states have call successors, (61) [2023-11-28 23:40:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:33,680 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2023-11-28 23:40:33,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-28 23:40:33,680 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 1.683168316831683) internal successors, (170), 69 states have internal predecessors, (170), 33 states have call successors, (33), 1 states have call predecessors, (33), 31 states have return successors, (61), 33 states have call predecessors, (61), 33 states have call successors, (61) Word has length 214 [2023-11-28 23:40:33,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:33,681 INFO L225 Difference]: With dead ends: 200 [2023-11-28 23:40:33,681 INFO L226 Difference]: Without dead ends: 196 [2023-11-28 23:40:33,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1576, Invalid=24830, Unknown=0, NotChecked=0, Total=26406 [2023-11-28 23:40:33,683 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 123 mSDsluCounter, 2076 mSDsCounter, 0 mSdLazyCounter, 4169 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2116 SdHoareTripleChecker+Invalid, 4218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 4169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:33,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 2116 Invalid, 4218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 4169 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-28 23:40:33,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-28 23:40:33,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 110. [2023-11-28 23:40:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 74 states have (on average 1.027027027027027) internal successors, (76), 75 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 32 states have return successors, (33), 32 states have call predecessors, (33), 3 states have call successors, (33) [2023-11-28 23:40:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2023-11-28 23:40:33,687 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 214 [2023-11-28 23:40:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:33,688 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2023-11-28 23:40:33,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 101 states have (on average 1.683168316831683) internal successors, (170), 69 states have internal predecessors, (170), 33 states have call successors, (33), 1 states have call predecessors, (33), 31 states have return successors, (61), 33 states have call predecessors, (61), 33 states have call successors, (61) [2023-11-28 23:40:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2023-11-28 23:40:33,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-11-28 23:40:33,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:33,689 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:33,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-28 23:40:33,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-28 23:40:33,890 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:33,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:33,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1375982445, now seen corresponding path program 15 times [2023-11-28 23:40:33,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:33,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9670964] [2023-11-28 23:40:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:33,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:34,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:40:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:35,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:35,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:36,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:36,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:37,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:37,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:38,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:38,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:38,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:39,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:39,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:39,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:39,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:40,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:40,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:40,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:40,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:41,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:41,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:41,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:41,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:41,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:41,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:41,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:42,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:42,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:42,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:42,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:42,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:42,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:40:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 690 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2023-11-28 23:40:42,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:42,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9670964] [2023-11-28 23:40:42,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9670964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:40:42,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708540362] [2023-11-28 23:40:42,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:40:42,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:42,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:42,808 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:42,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-28 23:40:43,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-11-28 23:40:43,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:40:43,850 WARN L260 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 256 conjunts are in the unsatisfiable core [2023-11-28 23:40:43,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2023-11-28 23:40:44,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:40:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 1320 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-28 23:40:55,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708540362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:40:55,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:40:55,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 96] total 106 [2023-11-28 23:40:55,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193832638] [2023-11-28 23:40:55,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:40:55,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-11-28 23:40:55,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:55,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-11-28 23:40:55,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=10756, Unknown=0, NotChecked=0, Total=11130 [2023-11-28 23:40:55,667 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 106 states, 104 states have (on average 1.6923076923076923) internal successors, (176), 72 states have internal predecessors, (176), 35 states have call successors, (35), 1 states have call predecessors, (35), 32 states have return successors, (63), 34 states have call predecessors, (63), 35 states have call successors, (63) [2023-11-28 23:40:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:59,428 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2023-11-28 23:40:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-28 23:40:59,429 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 104 states have (on average 1.6923076923076923) internal successors, (176), 72 states have internal predecessors, (176), 35 states have call successors, (35), 1 states have call predecessors, (35), 32 states have return successors, (63), 34 states have call predecessors, (63), 35 states have call successors, (63) Word has length 221 [2023-11-28 23:40:59,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:59,430 INFO L225 Difference]: With dead ends: 206 [2023-11-28 23:40:59,430 INFO L226 Difference]: Without dead ends: 202 [2023-11-28 23:40:59,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3028 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1632, Invalid=26424, Unknown=0, NotChecked=0, Total=28056 [2023-11-28 23:40:59,432 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 256 mSDsluCounter, 1978 mSDsCounter, 0 mSdLazyCounter, 3972 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 4148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 3972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:59,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 2019 Invalid, 4148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 3972 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-28 23:40:59,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-28 23:40:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 113. [2023-11-28 23:40:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 77 states have internal predecessors, (78), 3 states have call successors, (3), 2 states have call predecessors, (3), 33 states have return successors, (34), 33 states have call predecessors, (34), 3 states have call successors, (34) [2023-11-28 23:40:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2023-11-28 23:40:59,438 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 221 [2023-11-28 23:40:59,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:59,438 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2023-11-28 23:40:59,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 104 states have (on average 1.6923076923076923) internal successors, (176), 72 states have internal predecessors, (176), 35 states have call successors, (35), 1 states have call predecessors, (35), 32 states have return successors, (63), 34 states have call predecessors, (63), 35 states have call successors, (63) [2023-11-28 23:40:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2023-11-28 23:40:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-11-28 23:40:59,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:59,439 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:59,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-28 23:40:59,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-28 23:40:59,640 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:59,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:59,640 INFO L85 PathProgramCache]: Analyzing trace with hash -266875459, now seen corresponding path program 15 times [2023-11-28 23:40:59,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:59,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62848271] [2023-11-28 23:40:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:59,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:00,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:41:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:00,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:01,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:02,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:02,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:03,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:03,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:03,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:04,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:04,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:04,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:05,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:05,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:05,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:06,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:06,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:06,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:06,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:07,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:07,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:07,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:07,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:07,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:07,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:08,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:08,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:08,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:08,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:08,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:08,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:08,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:08,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 735 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2023-11-28 23:41:09,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:41:09,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62848271] [2023-11-28 23:41:09,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62848271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:41:09,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414565635] [2023-11-28 23:41:09,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:41:09,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:41:09,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:41:09,057 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:41:09,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-28 23:41:10,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-11-28 23:41:10,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:41:10,124 WARN L260 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 264 conjunts are in the unsatisfiable core [2023-11-28 23:41:10,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:41:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2023-11-28 23:41:10,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:41:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1410 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2023-11-28 23:41:22,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414565635] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:41:22,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:41:22,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 99] total 109 [2023-11-28 23:41:22,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126895548] [2023-11-28 23:41:22,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:41:22,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2023-11-28 23:41:22,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:41:22,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2023-11-28 23:41:22,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=11389, Unknown=0, NotChecked=0, Total=11772 [2023-11-28 23:41:22,601 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 109 states, 107 states have (on average 1.691588785046729) internal successors, (181), 74 states have internal predecessors, (181), 36 states have call successors, (36), 1 states have call predecessors, (36), 33 states have return successors, (65), 35 states have call predecessors, (65), 36 states have call successors, (65) [2023-11-28 23:41:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:41:26,755 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2023-11-28 23:41:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-28 23:41:26,755 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 107 states have (on average 1.691588785046729) internal successors, (181), 74 states have internal predecessors, (181), 36 states have call successors, (36), 1 states have call predecessors, (36), 33 states have return successors, (65), 35 states have call predecessors, (65), 36 states have call successors, (65) Word has length 228 [2023-11-28 23:41:26,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:41:26,757 INFO L225 Difference]: With dead ends: 212 [2023-11-28 23:41:26,757 INFO L226 Difference]: Without dead ends: 208 [2023-11-28 23:41:26,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3221 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1748, Invalid=28354, Unknown=0, NotChecked=0, Total=30102 [2023-11-28 23:41:26,759 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 112 mSDsluCounter, 2566 mSDsCounter, 0 mSdLazyCounter, 5187 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 2608 SdHoareTripleChecker+Invalid, 5230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 5187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-28 23:41:26,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 2608 Invalid, 5230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 5187 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-28 23:41:26,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-28 23:41:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 116. [2023-11-28 23:41:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 79 states have internal predecessors, (80), 3 states have call successors, (3), 2 states have call predecessors, (3), 34 states have return successors, (35), 34 states have call predecessors, (35), 3 states have call successors, (35) [2023-11-28 23:41:26,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2023-11-28 23:41:26,766 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 228 [2023-11-28 23:41:26,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:41:26,766 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2023-11-28 23:41:26,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 107 states have (on average 1.691588785046729) internal successors, (181), 74 states have internal predecessors, (181), 36 states have call successors, (36), 1 states have call predecessors, (36), 33 states have return successors, (65), 35 states have call predecessors, (65), 36 states have call successors, (65) [2023-11-28 23:41:26,766 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2023-11-28 23:41:26,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-11-28 23:41:26,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:41:26,768 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:41:26,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-28 23:41:26,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:41:26,969 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:41:26,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:41:26,969 INFO L85 PathProgramCache]: Analyzing trace with hash -975519619, now seen corresponding path program 16 times [2023-11-28 23:41:26,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:41:26,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340748957] [2023-11-28 23:41:26,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:41:26,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:41:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:27,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:41:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:28,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:29,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:29,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:30,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:30,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:31,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:31,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:32,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:32,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:32,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:33,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:33,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:33,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:34,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:34,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:34,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:34,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:35,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:35,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:35,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:35,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:35,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:35,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:36,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:36,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:36,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:36,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:36,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:36,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:36,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:37,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:37,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2023-11-28 23:41:37,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:41:37,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340748957] [2023-11-28 23:41:37,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340748957] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:41:37,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133946671] [2023-11-28 23:41:37,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 23:41:37,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:41:37,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:41:37,292 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:41:37,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-28 23:41:38,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 23:41:38,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:41:38,430 WARN L260 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 272 conjunts are in the unsatisfiable core [2023-11-28 23:41:38,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:41:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2023-11-28 23:41:38,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:41:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 1504 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2023-11-28 23:41:52,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133946671] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:41:52,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:41:52,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 102] total 112 [2023-11-28 23:41:52,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805627600] [2023-11-28 23:41:52,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:41:52,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2023-11-28 23:41:52,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:41:52,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2023-11-28 23:41:52,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=12036, Unknown=0, NotChecked=0, Total=12432 [2023-11-28 23:41:52,145 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 112 states, 110 states have (on average 1.690909090909091) internal successors, (186), 76 states have internal predecessors, (186), 37 states have call successors, (37), 1 states have call predecessors, (37), 34 states have return successors, (67), 36 states have call predecessors, (67), 37 states have call successors, (67) [2023-11-28 23:41:56,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:41:56,455 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2023-11-28 23:41:56,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-28 23:41:56,455 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 110 states have (on average 1.690909090909091) internal successors, (186), 76 states have internal predecessors, (186), 37 states have call successors, (37), 1 states have call predecessors, (37), 34 states have return successors, (67), 36 states have call predecessors, (67), 37 states have call successors, (67) Word has length 235 [2023-11-28 23:41:56,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:41:56,457 INFO L225 Difference]: With dead ends: 218 [2023-11-28 23:41:56,457 INFO L226 Difference]: Without dead ends: 214 [2023-11-28 23:41:56,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1801, Invalid=29705, Unknown=0, NotChecked=0, Total=31506 [2023-11-28 23:41:56,460 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 111 mSDsluCounter, 2328 mSDsCounter, 0 mSdLazyCounter, 4716 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 2371 SdHoareTripleChecker+Invalid, 4763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 4716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-28 23:41:56,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 2371 Invalid, 4763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 4716 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-28 23:41:56,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-28 23:41:56,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 119. [2023-11-28 23:41:56,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 80 states have (on average 1.025) internal successors, (82), 81 states have internal predecessors, (82), 3 states have call successors, (3), 2 states have call predecessors, (3), 35 states have return successors, (36), 35 states have call predecessors, (36), 3 states have call successors, (36) [2023-11-28 23:41:56,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2023-11-28 23:41:56,466 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 235 [2023-11-28 23:41:56,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:41:56,467 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2023-11-28 23:41:56,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 110 states have (on average 1.690909090909091) internal successors, (186), 76 states have internal predecessors, (186), 37 states have call successors, (37), 1 states have call predecessors, (37), 34 states have return successors, (67), 36 states have call predecessors, (67), 37 states have call successors, (67) [2023-11-28 23:41:56,467 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2023-11-28 23:41:56,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-11-28 23:41:56,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:41:56,468 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:41:56,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-28 23:41:56,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:41:56,669 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:41:56,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:41:56,669 INFO L85 PathProgramCache]: Analyzing trace with hash 93329815, now seen corresponding path program 16 times [2023-11-28 23:41:56,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:41:56,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25865325] [2023-11-28 23:41:56,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:41:56,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:41:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:57,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:41:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:58,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:58,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:59,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:59,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:41:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:00,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:00,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:01,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:01,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:02,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:02,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:03,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:03,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:03,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:04,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:04,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:04,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:04,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:05,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:05,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:05,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:05,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:05,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:06,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:06,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:06,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:06,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:06,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:07,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:07,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:07,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:07,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:07,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:07,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 1040 trivial. 0 not checked. [2023-11-28 23:42:07,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:42:07,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25865325] [2023-11-28 23:42:07,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25865325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:42:07,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731722278] [2023-11-28 23:42:07,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 23:42:07,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:42:07,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:42:07,729 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:42:07,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-28 23:42:08,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 23:42:08,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:42:08,849 WARN L260 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 280 conjunts are in the unsatisfiable core [2023-11-28 23:42:08,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:42:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2023-11-28 23:42:09,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:42:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2023-11-28 23:42:23,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731722278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:42:23,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:42:23,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 105] total 114 [2023-11-28 23:42:23,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185378542] [2023-11-28 23:42:23,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:42:23,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2023-11-28 23:42:23,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:42:23,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2023-11-28 23:42:23,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=12481, Unknown=0, NotChecked=0, Total=12882 [2023-11-28 23:42:23,045 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 114 states, 113 states have (on average 1.6814159292035398) internal successors, (190), 77 states have internal predecessors, (190), 37 states have call successors, (37), 1 states have call predecessors, (37), 35 states have return successors, (69), 37 states have call predecessors, (69), 37 states have call successors, (69) [2023-11-28 23:42:27,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:42:27,730 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2023-11-28 23:42:27,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-28 23:42:27,730 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 1.6814159292035398) internal successors, (190), 77 states have internal predecessors, (190), 37 states have call successors, (37), 1 states have call predecessors, (37), 35 states have return successors, (69), 37 states have call predecessors, (69), 37 states have call successors, (69) Word has length 242 [2023-11-28 23:42:27,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:42:27,732 INFO L225 Difference]: With dead ends: 224 [2023-11-28 23:42:27,732 INFO L226 Difference]: Without dead ends: 220 [2023-11-28 23:42:27,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3346 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1918, Invalid=31388, Unknown=0, NotChecked=0, Total=33306 [2023-11-28 23:42:27,735 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 137 mSDsluCounter, 2817 mSDsCounter, 0 mSdLazyCounter, 5372 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 2861 SdHoareTripleChecker+Invalid, 5427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 5372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-28 23:42:27,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 2861 Invalid, 5427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 5372 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-28 23:42:27,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-28 23:42:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 122. [2023-11-28 23:42:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 82 states have (on average 1.024390243902439) internal successors, (84), 83 states have internal predecessors, (84), 3 states have call successors, (3), 2 states have call predecessors, (3), 36 states have return successors, (37), 36 states have call predecessors, (37), 3 states have call successors, (37) [2023-11-28 23:42:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2023-11-28 23:42:27,739 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 242 [2023-11-28 23:42:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:42:27,740 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2023-11-28 23:42:27,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 113 states have (on average 1.6814159292035398) internal successors, (190), 77 states have internal predecessors, (190), 37 states have call successors, (37), 1 states have call predecessors, (37), 35 states have return successors, (69), 37 states have call predecessors, (69), 37 states have call successors, (69) [2023-11-28 23:42:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2023-11-28 23:42:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-28 23:42:27,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:42:27,741 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:42:27,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-28 23:42:27,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-28 23:42:27,941 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:42:27,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:42:27,942 INFO L85 PathProgramCache]: Analyzing trace with hash -156238105, now seen corresponding path program 17 times [2023-11-28 23:42:27,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:42:27,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649495047] [2023-11-28 23:42:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:42:27,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:42:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:28,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:42:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:29,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:30,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:30,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:31,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:32,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:32,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:33,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:33,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:33,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:34,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:34,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:35,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:35,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:35,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:36,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:36,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:36,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:37,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:37,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:37,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:37,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:37,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:38,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:38,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:38,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:38,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:38,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:38,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:39,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:39,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:39,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:39,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:39,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:39,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:42:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 884 refuted. 0 times theorem prover too weak. 1105 trivial. 0 not checked. [2023-11-28 23:42:39,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:42:39,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649495047] [2023-11-28 23:42:39,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649495047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:42:39,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966148548] [2023-11-28 23:42:39,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 23:42:39,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:42:39,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:42:39,866 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:42:39,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-28 23:42:41,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2023-11-28 23:42:41,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:42:41,076 WARN L260 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 288 conjunts are in the unsatisfiable core [2023-11-28 23:42:41,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:42:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2023-11-28 23:42:41,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:42:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 1700 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-11-28 23:42:55,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966148548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:42:55,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:42:55,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 108] total 118 [2023-11-28 23:42:55,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017086940] [2023-11-28 23:42:55,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:42:55,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2023-11-28 23:42:55,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:42:55,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2023-11-28 23:42:55,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=13388, Unknown=0, NotChecked=0, Total=13806 [2023-11-28 23:42:55,845 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand has 118 states, 116 states have (on average 1.6896551724137931) internal successors, (196), 80 states have internal predecessors, (196), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (71), 38 states have call predecessors, (71), 39 states have call successors, (71) [2023-11-28 23:43:00,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:43:00,273 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2023-11-28 23:43:00,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-28 23:43:00,273 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 116 states have (on average 1.6896551724137931) internal successors, (196), 80 states have internal predecessors, (196), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (71), 38 states have call predecessors, (71), 39 states have call successors, (71) Word has length 249 [2023-11-28 23:43:00,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:43:00,275 INFO L225 Difference]: With dead ends: 230 [2023-11-28 23:43:00,275 INFO L226 Difference]: Without dead ends: 226 [2023-11-28 23:43:00,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3764 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1978, Invalid=33178, Unknown=0, NotChecked=0, Total=35156 [2023-11-28 23:43:00,279 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 328 mSDsluCounter, 2499 mSDsCounter, 0 mSdLazyCounter, 4888 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 2544 SdHoareTripleChecker+Invalid, 5123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 4888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:43:00,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 2544 Invalid, 5123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 4888 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-28 23:43:00,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-28 23:43:00,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 125. [2023-11-28 23:43:00,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 85 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 37 states have return successors, (38), 37 states have call predecessors, (38), 3 states have call successors, (38) [2023-11-28 23:43:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2023-11-28 23:43:00,285 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 249 [2023-11-28 23:43:00,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:43:00,286 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2023-11-28 23:43:00,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 116 states have (on average 1.6896551724137931) internal successors, (196), 80 states have internal predecessors, (196), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (71), 38 states have call predecessors, (71), 39 states have call successors, (71) [2023-11-28 23:43:00,286 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2023-11-28 23:43:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-28 23:43:00,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:43:00,288 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:43:00,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-28 23:43:00,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-28 23:43:00,489 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:43:00,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:43:00,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1639290865, now seen corresponding path program 17 times [2023-11-28 23:43:00,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:43:00,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333400549] [2023-11-28 23:43:00,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:43:00,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:43:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:01,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:43:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:02,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:02,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:03,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:04,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:04,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:05,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:05,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:06,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:06,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:07,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:07,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:08,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:08,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:08,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:09,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:09,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:09,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:10,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:10,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:10,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:10,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:11,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:11,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:11,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:11,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:11,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:12,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:12,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:12,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:12,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:12,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:12,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:12,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:12,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:13,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 935 refuted. 0 times theorem prover too weak. 1173 trivial. 0 not checked. [2023-11-28 23:43:13,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:43:13,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333400549] [2023-11-28 23:43:13,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333400549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:43:13,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604322493] [2023-11-28 23:43:13,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 23:43:13,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:43:13,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:43:13,202 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:43:13,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-28 23:43:14,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2023-11-28 23:43:14,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:43:14,469 WARN L260 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 296 conjunts are in the unsatisfiable core [2023-11-28 23:43:14,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:43:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2023-11-28 23:43:14,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:43:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 1802 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2023-11-28 23:43:29,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604322493] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:43:29,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:43:29,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 111] total 120 [2023-11-28 23:43:29,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944620085] [2023-11-28 23:43:29,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:43:29,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2023-11-28 23:43:29,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:43:29,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2023-11-28 23:43:29,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=13857, Unknown=0, NotChecked=0, Total=14280 [2023-11-28 23:43:29,946 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 120 states, 119 states have (on average 1.680672268907563) internal successors, (200), 81 states have internal predecessors, (200), 39 states have call successors, (39), 1 states have call predecessors, (39), 37 states have return successors, (73), 39 states have call predecessors, (73), 39 states have call successors, (73) [2023-11-28 23:43:35,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:43:35,099 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2023-11-28 23:43:35,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-28 23:43:35,099 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 119 states have (on average 1.680672268907563) internal successors, (200), 81 states have internal predecessors, (200), 39 states have call successors, (39), 1 states have call predecessors, (39), 37 states have return successors, (73), 39 states have call predecessors, (73), 39 states have call successors, (73) Word has length 256 [2023-11-28 23:43:35,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:43:35,101 INFO L225 Difference]: With dead ends: 236 [2023-11-28 23:43:35,101 INFO L226 Difference]: Without dead ends: 232 [2023-11-28 23:43:35,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3721 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2101, Invalid=34955, Unknown=0, NotChecked=0, Total=37056 [2023-11-28 23:43:35,104 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 120 mSDsluCounter, 2959 mSDsCounter, 0 mSdLazyCounter, 5947 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 3005 SdHoareTripleChecker+Invalid, 5992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 5947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:43:35,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 3005 Invalid, 5992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 5947 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-28 23:43:35,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-11-28 23:43:35,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 128. [2023-11-28 23:43:35,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 87 states have internal predecessors, (88), 3 states have call successors, (3), 2 states have call predecessors, (3), 38 states have return successors, (39), 38 states have call predecessors, (39), 3 states have call successors, (39) [2023-11-28 23:43:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2023-11-28 23:43:35,108 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 256 [2023-11-28 23:43:35,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:43:35,109 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2023-11-28 23:43:35,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 119 states have (on average 1.680672268907563) internal successors, (200), 81 states have internal predecessors, (200), 39 states have call successors, (39), 1 states have call predecessors, (39), 37 states have return successors, (73), 39 states have call predecessors, (73), 39 states have call successors, (73) [2023-11-28 23:43:35,109 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2023-11-28 23:43:35,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2023-11-28 23:43:35,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:43:35,110 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:43:35,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-28 23:43:35,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-28 23:43:35,311 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:43:35,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:43:35,311 INFO L85 PathProgramCache]: Analyzing trace with hash 947292113, now seen corresponding path program 18 times [2023-11-28 23:43:35,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:43:35,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362859353] [2023-11-28 23:43:35,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:43:35,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:43:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:36,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:43:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:37,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:37,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:38,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:39,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:39,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:40,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:41,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:41,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:42,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:42,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:43,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:43,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:43,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:44,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:44,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:44,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:45,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:45,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:45,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:46,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:46,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:46,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:46,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:47,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:47,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:47,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:47,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:47,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:47,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:48,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:48,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:48,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:48,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:48,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:48,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:48,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:43:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:43:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 1242 trivial. 0 not checked. [2023-11-28 23:43:49,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:43:49,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362859353] [2023-11-28 23:43:49,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362859353] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:43:49,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445129814] [2023-11-28 23:43:49,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 23:43:49,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:43:49,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:43:49,001 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:43:49,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-28 23:43:50,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-11-28 23:43:50,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:43:50,341 WARN L260 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 304 conjunts are in the unsatisfiable core [2023-11-28 23:43:50,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:43:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2023-11-28 23:43:50,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:44:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 1908 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-11-28 23:44:06,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445129814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:44:06,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:44:06,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 114] total 124 [2023-11-28 23:44:06,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918728044] [2023-11-28 23:44:06,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:44:06,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2023-11-28 23:44:06,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:44:06,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2023-11-28 23:44:06,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=14812, Unknown=0, NotChecked=0, Total=15252 [2023-11-28 23:44:06,822 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 124 states, 122 states have (on average 1.6885245901639345) internal successors, (206), 84 states have internal predecessors, (206), 41 states have call successors, (41), 1 states have call predecessors, (41), 38 states have return successors, (75), 40 states have call predecessors, (75), 41 states have call successors, (75) [2023-11-28 23:44:11,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:44:11,961 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2023-11-28 23:44:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-28 23:44:11,961 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 122 states have (on average 1.6885245901639345) internal successors, (206), 84 states have internal predecessors, (206), 41 states have call successors, (41), 1 states have call predecessors, (41), 38 states have return successors, (75), 40 states have call predecessors, (75), 41 states have call successors, (75) Word has length 263 [2023-11-28 23:44:11,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:44:11,963 INFO L225 Difference]: With dead ends: 242 [2023-11-28 23:44:11,963 INFO L226 Difference]: Without dead ends: 238 [2023-11-28 23:44:11,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4162 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2163, Invalid=36843, Unknown=0, NotChecked=0, Total=39006 [2023-11-28 23:44:11,967 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 93 mSDsluCounter, 3234 mSDsCounter, 0 mSdLazyCounter, 6133 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 3281 SdHoareTripleChecker+Invalid, 6191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 6133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:44:11,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 3281 Invalid, 6191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 6133 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-28 23:44:11,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-11-28 23:44:11,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 131. [2023-11-28 23:44:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 89 states have internal predecessors, (90), 3 states have call successors, (3), 2 states have call predecessors, (3), 39 states have return successors, (40), 39 states have call predecessors, (40), 3 states have call successors, (40) [2023-11-28 23:44:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2023-11-28 23:44:11,974 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 263 [2023-11-28 23:44:11,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:44:11,974 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2023-11-28 23:44:11,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 122 states have (on average 1.6885245901639345) internal successors, (206), 84 states have internal predecessors, (206), 41 states have call successors, (41), 1 states have call predecessors, (41), 38 states have return successors, (75), 40 states have call predecessors, (75), 41 states have call successors, (75) [2023-11-28 23:44:11,974 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2023-11-28 23:44:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2023-11-28 23:44:11,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:44:11,976 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:44:11,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-28 23:44:12,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-28 23:44:12,177 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:44:12,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:44:12,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1365502155, now seen corresponding path program 18 times [2023-11-28 23:44:12,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:44:12,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283774129] [2023-11-28 23:44:12,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:44:12,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:44:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:13,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-28 23:44:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:13,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:14,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:15,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:16,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:16,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:17,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:18,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:18,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:19,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:19,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:20,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:20,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:21,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:21,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:21,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:22,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:22,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:22,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:23,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:23,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:23,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:24,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:24,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:24,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:24,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:24,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:25,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:25,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:25,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:25,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:25,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:25,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:26,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:26,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:26,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:26,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:26,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 23:44:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:44:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2023-11-28 23:44:26,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:44:26,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283774129] [2023-11-28 23:44:26,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283774129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:44:26,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299808846] [2023-11-28 23:44:26,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 23:44:26,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:44:26,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:44:26,711 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:44:26,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae7a2b89-388d-4b2b-bac7-0e32fbbeab9e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-28 23:44:28,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-11-28 23:44:28,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:44:28,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 236 conjunts are in the unsatisfiable core [2023-11-28 23:44:28,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:44:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2023-11-28 23:44:34,067 INFO L327 TraceCheckSpWp]: Computing backward predicates...