./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de32.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_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/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_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de32.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/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_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/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 be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:47:33,631 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:47:33,697 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:47:33,702 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:47:33,702 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:47:33,727 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:47:33,728 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:47:33,728 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:47:33,729 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:47:33,729 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:47:33,730 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:47:33,730 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:47:33,731 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:47:33,732 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:47:33,732 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:47:33,733 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:47:33,733 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:47:33,734 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:47:33,734 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:47:33,735 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:47:33,735 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:47:33,736 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:47:33,736 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:47:33,737 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:47:33,737 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:47:33,737 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:47:33,738 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:47:33,738 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:47:33,739 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:47:33,739 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:47:33,740 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:47:33,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:47:33,740 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:47:33,741 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:47:33,741 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:47:33,741 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:47:33,741 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:47:33,741 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:47:33,742 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:47:33,742 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:47:33,742 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:47:33,742 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:47:33,743 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_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 [2023-11-29 05:47:33,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:47:33,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:47:33,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:47:33,998 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:47:33,998 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:47:33,999 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loops-crafted-1/in-de32.c [2023-11-29 05:47:36,688 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:47:36,857 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:47:36,858 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/sv-benchmarks/c/loops-crafted-1/in-de32.c [2023-11-29 05:47:36,865 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/data/b7d4e31a6/7229c0174c1448dcb548bbd62b9566da/FLAG9b573d67e [2023-11-29 05:47:36,880 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/data/b7d4e31a6/7229c0174c1448dcb548bbd62b9566da [2023-11-29 05:47:36,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:47:36,884 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:47:36,885 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:47:36,885 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:47:36,890 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:47:36,891 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:47:36" (1/1) ... [2023-11-29 05:47:36,892 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16c4c5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:47:36, skipping insertion in model container [2023-11-29 05:47:36,893 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:47:36" (1/1) ... [2023-11-29 05:47:36,911 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:47:37,036 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_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/sv-benchmarks/c/loops-crafted-1/in-de32.c[368,381] [2023-11-29 05:47:37,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:47:37,057 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:47:37,066 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_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/sv-benchmarks/c/loops-crafted-1/in-de32.c[368,381] [2023-11-29 05:47:37,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:47:37,082 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:47:37,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:47:37 WrapperNode [2023-11-29 05:47:37,083 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:47:37,084 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:47:37,084 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:47:37,084 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:47:37,091 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:47:37" (1/1) ... [2023-11-29 05:47:37,097 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:47:37" (1/1) ... [2023-11-29 05:47:37,112 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2023-11-29 05:47:37,113 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:47:37,114 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:47:37,114 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:47:37,114 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:47:37,123 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:47:37" (1/1) ... [2023-11-29 05:47:37,123 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:47:37" (1/1) ... [2023-11-29 05:47:37,125 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:47:37" (1/1) ... [2023-11-29 05:47:37,136 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]. [2023-11-29 05:47:37,136 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:47:37" (1/1) ... [2023-11-29 05:47:37,136 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:47:37" (1/1) ... [2023-11-29 05:47:37,140 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:47:37" (1/1) ... [2023-11-29 05:47:37,144 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:47:37" (1/1) ... [2023-11-29 05:47:37,145 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:47:37" (1/1) ... [2023-11-29 05:47:37,146 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:47:37" (1/1) ... [2023-11-29 05:47:37,148 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:47:37,149 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:47:37,149 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:47:37,149 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:47:37,150 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:47:37" (1/1) ... [2023-11-29 05:47:37,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:47:37,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:37,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:47:37,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:47:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:47:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:47:37,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:47:37,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:47:37,292 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:47:37,294 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:47:37,411 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:47:37,435 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:47:37,435 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 05:47:37,436 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:47:37 BoogieIcfgContainer [2023-11-29 05:47:37,436 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:47:37,440 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:47:37,440 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:47:37,443 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:47:37,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:47:36" (1/3) ... [2023-11-29 05:47:37,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afa4a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:47:37, skipping insertion in model container [2023-11-29 05:47:37,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:47:37" (2/3) ... [2023-11-29 05:47:37,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afa4a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:47:37, skipping insertion in model container [2023-11-29 05:47:37,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:47:37" (3/3) ... [2023-11-29 05:47:37,447 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de32.c [2023-11-29 05:47:37,467 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:47:37,467 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:47:37,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:47:37,526 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;@7a6f093f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:47:37,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:47:37,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:37,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 05:47:37,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:37,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:37,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:37,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:37,544 INFO L85 PathProgramCache]: Analyzing trace with hash -593791358, now seen corresponding path program 1 times [2023-11-29 05:47:37,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:37,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936085810] [2023-11-29 05:47:37,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:37,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:37,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:37,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936085810] [2023-11-29 05:47:37,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936085810] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:47:37,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:47:37,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:47:37,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843604120] [2023-11-29 05:47:37,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:47:37,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:47:37,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:37,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:47:37,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:47:37,873 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:37,941 INFO L93 Difference]: Finished difference Result 25 states and 40 transitions. [2023-11-29 05:47:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:47:37,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-29 05:47:37,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:37,950 INFO L225 Difference]: With dead ends: 25 [2023-11-29 05:47:37,950 INFO L226 Difference]: Without dead ends: 11 [2023-11-29 05:47:37,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:47:37,956 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:37,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:47:37,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-29 05:47:37,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-29 05:47:37,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2023-11-29 05:47:37,985 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 8 [2023-11-29 05:47:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:37,986 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2023-11-29 05:47:37,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2023-11-29 05:47:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 05:47:37,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:37,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:37,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:47:37,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:37,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:37,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1225997519, now seen corresponding path program 1 times [2023-11-29 05:47:37,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:37,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030035039] [2023-11-29 05:47:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:37,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:38,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:38,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030035039] [2023-11-29 05:47:38,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030035039] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:47:38,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:47:38,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:47:38,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22462895] [2023-11-29 05:47:38,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:47:38,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:47:38,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:38,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:47:38,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:47:38,088 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:38,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:38,108 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-11-29 05:47:38,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:47:38,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 05:47:38,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:38,109 INFO L225 Difference]: With dead ends: 26 [2023-11-29 05:47:38,109 INFO L226 Difference]: Without dead ends: 20 [2023-11-29 05:47:38,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:47:38,111 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:38,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:47:38,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-29 05:47:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2023-11-29 05:47:38,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:38,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2023-11-29 05:47:38,120 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 9 [2023-11-29 05:47:38,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:38,120 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2023-11-29 05:47:38,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:38,121 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2023-11-29 05:47:38,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 05:47:38,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:38,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:38,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:47:38,122 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:38,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:38,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1180744990, now seen corresponding path program 1 times [2023-11-29 05:47:38,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:38,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007378050] [2023-11-29 05:47:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:38,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:38,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:38,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007378050] [2023-11-29 05:47:38,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007378050] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:47:38,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:47:38,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:47:38,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572459519] [2023-11-29 05:47:38,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:47:38,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:47:38,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:38,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:47:38,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:47:38,196 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:38,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:38,225 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-11-29 05:47:38,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:47:38,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 05:47:38,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:38,227 INFO L225 Difference]: With dead ends: 20 [2023-11-29 05:47:38,227 INFO L226 Difference]: Without dead ends: 12 [2023-11-29 05:47:38,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:47:38,229 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:38,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:47:38,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-29 05:47:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-29 05:47:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:38,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2023-11-29 05:47:38,235 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2023-11-29 05:47:38,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:38,235 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2023-11-29 05:47:38,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2023-11-29 05:47:38,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 05:47:38,236 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:38,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:38,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:47:38,237 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:38,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:38,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1468808784, now seen corresponding path program 1 times [2023-11-29 05:47:38,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:38,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566491843] [2023-11-29 05:47:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:38,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:47:38,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:38,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566491843] [2023-11-29 05:47:38,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566491843] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:38,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594316310] [2023-11-29 05:47:38,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:38,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:38,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:38,347 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:38,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:47:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:38,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:47:38,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:47:38,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:47:38,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594316310] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:38,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:47:38,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-29 05:47:38,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395302753] [2023-11-29 05:47:38,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:47:38,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:47:38,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:38,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:47:38,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:47:38,497 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:38,523 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2023-11-29 05:47:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:47:38,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 05:47:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:38,525 INFO L225 Difference]: With dead ends: 17 [2023-11-29 05:47:38,525 INFO L226 Difference]: Without dead ends: 11 [2023-11-29 05:47:38,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:47:38,527 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:38,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:47:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-29 05:47:38,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-29 05:47:38,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-11-29 05:47:38,532 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 10 [2023-11-29 05:47:38,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:38,533 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-11-29 05:47:38,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:38,533 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-11-29 05:47:38,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 05:47:38,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:38,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:38,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:47:38,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:38,735 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:38,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:38,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1514061313, now seen corresponding path program 1 times [2023-11-29 05:47:38,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:38,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550286785] [2023-11-29 05:47:38,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:38,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:47:38,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:38,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550286785] [2023-11-29 05:47:38,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550286785] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:38,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014991379] [2023-11-29 05:47:38,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:38,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:38,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:38,816 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:38,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:47:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:38,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:47:38,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:38,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:47:38,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014991379] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:38,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:47:38,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 8 [2023-11-29 05:47:38,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105127953] [2023-11-29 05:47:38,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:47:38,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:47:38,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:38,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:47:38,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:47:38,937 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:38,953 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2023-11-29 05:47:38,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:47:38,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 05:47:38,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:38,954 INFO L225 Difference]: With dead ends: 16 [2023-11-29 05:47:38,954 INFO L226 Difference]: Without dead ends: 12 [2023-11-29 05:47:38,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:47:38,956 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:38,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:47:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-29 05:47:38,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-29 05:47:38,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:38,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-11-29 05:47:38,961 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2023-11-29 05:47:38,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:38,961 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-11-29 05:47:38,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:38,961 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-11-29 05:47:38,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 05:47:38,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:38,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:38,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:47:39,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:39,167 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:39,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:39,167 INFO L85 PathProgramCache]: Analyzing trace with hash -307074158, now seen corresponding path program 1 times [2023-11-29 05:47:39,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:39,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147306032] [2023-11-29 05:47:39,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:39,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:47:39,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:39,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147306032] [2023-11-29 05:47:39,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147306032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:39,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069299956] [2023-11-29 05:47:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:39,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:39,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:39,322 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:39,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:47:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:39,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:47:39,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:47:39,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:47:39,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069299956] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:39,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:39,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-11-29 05:47:39,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682273185] [2023-11-29 05:47:39,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:39,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:47:39,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:39,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:47:39,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:47:39,506 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:39,545 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2023-11-29 05:47:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:47:39,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-29 05:47:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:39,546 INFO L225 Difference]: With dead ends: 19 [2023-11-29 05:47:39,547 INFO L226 Difference]: Without dead ends: 15 [2023-11-29 05:47:39,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:47:39,548 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:39,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:47:39,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-29 05:47:39,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-11-29 05:47:39,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-11-29 05:47:39,553 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 11 [2023-11-29 05:47:39,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:39,553 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-11-29 05:47:39,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-11-29 05:47:39,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 05:47:39,554 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:39,554 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:39,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:47:39,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:39,755 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:39,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:39,756 INFO L85 PathProgramCache]: Analyzing trace with hash -927698911, now seen corresponding path program 2 times [2023-11-29 05:47:39,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:39,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497115240] [2023-11-29 05:47:39,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:39,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:47:39,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:39,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497115240] [2023-11-29 05:47:39,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497115240] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:39,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888417208] [2023-11-29 05:47:39,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:47:39,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:39,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:39,818 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:39,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:47:39,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:47:39,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:39,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:47:39,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:39,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:47:39,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888417208] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:39,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:39,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 6] total 10 [2023-11-29 05:47:39,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985230431] [2023-11-29 05:47:39,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:39,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:47:39,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:39,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:47:39,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:47:39,981 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:40,063 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2023-11-29 05:47:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:47:40,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-29 05:47:40,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:40,068 INFO L225 Difference]: With dead ends: 28 [2023-11-29 05:47:40,068 INFO L226 Difference]: Without dead ends: 14 [2023-11-29 05:47:40,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:47:40,069 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:40,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:47:40,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-29 05:47:40,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-29 05:47:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-11-29 05:47:40,075 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2023-11-29 05:47:40,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:40,075 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-11-29 05:47:40,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:40,075 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-11-29 05:47:40,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 05:47:40,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:40,076 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:40,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:47:40,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:40,277 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:40,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:40,277 INFO L85 PathProgramCache]: Analyzing trace with hash -78994671, now seen corresponding path program 3 times [2023-11-29 05:47:40,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:40,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833375708] [2023-11-29 05:47:40,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:40,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:47:40,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:40,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833375708] [2023-11-29 05:47:40,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833375708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:40,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445169753] [2023-11-29 05:47:40,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:47:40,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:40,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:40,354 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:40,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:47:40,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:47:40,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:40,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:47:40,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:40,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:47:40,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445169753] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:40,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:40,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2023-11-29 05:47:40,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718055896] [2023-11-29 05:47:40,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:40,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:47:40,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:40,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:47:40,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:47:40,526 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:40,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:40,642 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2023-11-29 05:47:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:47:40,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-29 05:47:40,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:40,644 INFO L225 Difference]: With dead ends: 43 [2023-11-29 05:47:40,644 INFO L226 Difference]: Without dead ends: 38 [2023-11-29 05:47:40,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:47:40,646 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:40,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 28 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:47:40,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-29 05:47:40,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 23. [2023-11-29 05:47:40,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-29 05:47:40,657 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2023-11-29 05:47:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:40,657 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-29 05:47:40,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-29 05:47:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 05:47:40,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:40,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:40,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:47:40,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 05:47:40,859 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:40,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1847797890, now seen corresponding path program 4 times [2023-11-29 05:47:40,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:40,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730864761] [2023-11-29 05:47:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:40,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:47:41,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:41,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730864761] [2023-11-29 05:47:41,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730864761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:41,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205333218] [2023-11-29 05:47:41,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:47:41,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:41,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:41,007 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:41,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:47:41,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:47:41,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:41,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:47:41,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:47:41,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:47:41,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205333218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:41,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:41,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2023-11-29 05:47:41,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006834506] [2023-11-29 05:47:41,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:41,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:47:41,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:41,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:47:41,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:47:41,173 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:41,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:41,236 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-11-29 05:47:41,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:47:41,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-29 05:47:41,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:41,237 INFO L225 Difference]: With dead ends: 35 [2023-11-29 05:47:41,237 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 05:47:41,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:47:41,238 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:41,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:47:41,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 05:47:41,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-11-29 05:47:41,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-29 05:47:41,251 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 14 [2023-11-29 05:47:41,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:41,252 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-29 05:47:41,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:41,252 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-29 05:47:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 05:47:41,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:41,253 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:41,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 05:47:41,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:41,455 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:41,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:41,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1986832546, now seen corresponding path program 5 times [2023-11-29 05:47:41,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:41,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140636537] [2023-11-29 05:47:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:41,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:47:41,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:41,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140636537] [2023-11-29 05:47:41,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140636537] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:41,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948099984] [2023-11-29 05:47:41,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:47:41,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:41,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:41,561 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:41,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:47:41,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 05:47:41,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:41,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:47:41,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:47:41,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:47:41,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948099984] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:41,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:41,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2023-11-29 05:47:41,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361096983] [2023-11-29 05:47:41,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:41,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:47:41,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:41,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:47:41,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:47:41,847 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:42,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:42,053 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2023-11-29 05:47:42,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:47:42,054 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-29 05:47:42,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:42,056 INFO L225 Difference]: With dead ends: 59 [2023-11-29 05:47:42,056 INFO L226 Difference]: Without dead ends: 47 [2023-11-29 05:47:42,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:47:42,057 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:42,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 52 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:47:42,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-29 05:47:42,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 17. [2023-11-29 05:47:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-11-29 05:47:42,071 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2023-11-29 05:47:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:42,071 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-11-29 05:47:42,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-11-29 05:47:42,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 05:47:42,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:42,072 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:42,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:47:42,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:42,273 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:42,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:42,273 INFO L85 PathProgramCache]: Analyzing trace with hash -904677104, now seen corresponding path program 6 times [2023-11-29 05:47:42,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:42,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672483605] [2023-11-29 05:47:42,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:42,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:47:42,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:42,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672483605] [2023-11-29 05:47:42,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672483605] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:42,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698004209] [2023-11-29 05:47:42,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:47:42,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:42,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:42,395 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:42,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:47:42,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 05:47:42,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:42,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:47:42,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:47:42,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:47:42,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698004209] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:42,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:42,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 05:47:42,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190592735] [2023-11-29 05:47:42,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:42,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:47:42,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:42,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:47:42,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:47:42,636 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:42,922 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2023-11-29 05:47:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:47:42,923 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-29 05:47:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:42,923 INFO L225 Difference]: With dead ends: 46 [2023-11-29 05:47:42,923 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 05:47:42,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:47:42,925 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:42,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 45 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:47:42,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 05:47:42,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-11-29 05:47:42,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:42,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-29 05:47:42,949 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2023-11-29 05:47:42,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:42,950 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-29 05:47:42,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:42,950 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-29 05:47:42,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 05:47:42,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:42,951 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:42,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:47:43,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:43,151 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:43,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:43,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1519806738, now seen corresponding path program 7 times [2023-11-29 05:47:43,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:43,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617142038] [2023-11-29 05:47:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:43,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:47:43,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:43,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617142038] [2023-11-29 05:47:43,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617142038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:43,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567624302] [2023-11-29 05:47:43,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:47:43,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:43,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:43,333 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:43,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:47:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:43,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 05:47:43,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:47:43,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:47:43,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567624302] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:43,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:43,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2023-11-29 05:47:43,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740717527] [2023-11-29 05:47:43,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:43,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:47:43,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:43,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:47:43,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:47:43,534 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:43,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:43,629 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2023-11-29 05:47:43,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:47:43,629 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-29 05:47:43,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:43,630 INFO L225 Difference]: With dead ends: 44 [2023-11-29 05:47:43,631 INFO L226 Difference]: Without dead ends: 36 [2023-11-29 05:47:43,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 11 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:47:43,632 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:43,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:47:43,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-29 05:47:43,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2023-11-29 05:47:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:43,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-11-29 05:47:43,658 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 17 [2023-11-29 05:47:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:43,658 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-11-29 05:47:43,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-11-29 05:47:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 05:47:43,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:43,659 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:43,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:47:43,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 05:47:43,860 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:43,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:43,860 INFO L85 PathProgramCache]: Analyzing trace with hash 2026879586, now seen corresponding path program 8 times [2023-11-29 05:47:43,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:43,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598784475] [2023-11-29 05:47:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:43,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:47:44,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:44,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598784475] [2023-11-29 05:47:44,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598784475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:44,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845975469] [2023-11-29 05:47:44,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:47:44,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:44,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:44,033 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:44,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:47:44,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:47:44,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:44,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 05:47:44,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:47:44,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:47:44,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845975469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:44,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:44,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-11-29 05:47:44,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142235790] [2023-11-29 05:47:44,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:44,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:47:44,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:44,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:47:44,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:47:44,385 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:44,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:44,882 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2023-11-29 05:47:44,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 05:47:44,883 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-29 05:47:44,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:44,883 INFO L225 Difference]: With dead ends: 65 [2023-11-29 05:47:44,884 INFO L226 Difference]: Without dead ends: 52 [2023-11-29 05:47:44,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2023-11-29 05:47:44,885 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:44,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 59 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:47:44,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-29 05:47:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2023-11-29 05:47:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-11-29 05:47:44,919 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 19 [2023-11-29 05:47:44,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:44,920 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-11-29 05:47:44,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:44,920 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-11-29 05:47:44,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 05:47:44,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:44,921 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:44,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:47:45,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:45,123 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:45,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:45,124 INFO L85 PathProgramCache]: Analyzing trace with hash 759212432, now seen corresponding path program 9 times [2023-11-29 05:47:45,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:45,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095636836] [2023-11-29 05:47:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:45,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:47:45,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:45,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095636836] [2023-11-29 05:47:45,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095636836] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:45,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173582738] [2023-11-29 05:47:45,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:47:45,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:45,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:45,257 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:45,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:47:45,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:47:45,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:45,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 05:47:45,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:47:45,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:47:45,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173582738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:45,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:45,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2023-11-29 05:47:45,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631283873] [2023-11-29 05:47:45,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:45,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 05:47:45,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:45,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 05:47:45,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:47:45,613 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:46,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:46,006 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2023-11-29 05:47:46,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 05:47:46,007 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-29 05:47:46,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:46,007 INFO L225 Difference]: With dead ends: 78 [2023-11-29 05:47:46,007 INFO L226 Difference]: Without dead ends: 62 [2023-11-29 05:47:46,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:47:46,009 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 63 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:46,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 66 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:47:46,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-29 05:47:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2023-11-29 05:47:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-11-29 05:47:46,034 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 20 [2023-11-29 05:47:46,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:46,034 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-11-29 05:47:46,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:46,034 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-11-29 05:47:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 05:47:46,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:46,035 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:46,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 05:47:46,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 05:47:46,239 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:46,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash 39467650, now seen corresponding path program 10 times [2023-11-29 05:47:46,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:46,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564033793] [2023-11-29 05:47:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:46,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:47:46,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:46,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564033793] [2023-11-29 05:47:46,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564033793] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:46,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641211513] [2023-11-29 05:47:46,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:47:46,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:46,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:46,442 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:46,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:47:46,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:47:46,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:46,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 05:47:46,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:47:46,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:47:46,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641211513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:46,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:46,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2023-11-29 05:47:46,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135013971] [2023-11-29 05:47:46,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:46,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:47:46,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:46,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:47:46,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:47:46,685 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:46,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:46,813 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2023-11-29 05:47:46,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:47:46,814 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-29 05:47:46,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:46,814 INFO L225 Difference]: With dead ends: 52 [2023-11-29 05:47:46,814 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 05:47:46,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 13 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:47:46,815 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:46,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 43 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:47:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 05:47:46,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2023-11-29 05:47:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2023-11-29 05:47:46,841 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 20 [2023-11-29 05:47:46,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:46,842 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2023-11-29 05:47:46,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2023-11-29 05:47:46,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 05:47:46,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:46,843 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:46,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:47:47,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 05:47:47,043 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:47,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:47,044 INFO L85 PathProgramCache]: Analyzing trace with hash -920435760, now seen corresponding path program 11 times [2023-11-29 05:47:47,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:47,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976356521] [2023-11-29 05:47:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:47,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 05:47:47,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:47,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976356521] [2023-11-29 05:47:47,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976356521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:47,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540877889] [2023-11-29 05:47:47,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:47:47,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:47,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:47,222 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:47,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:47:47,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 05:47:47,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:47,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 05:47:47,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 05:47:47,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 05:47:47,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540877889] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:47,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:47,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2023-11-29 05:47:47,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150162607] [2023-11-29 05:47:47,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:47,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 05:47:47,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:47,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 05:47:47,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:47:47,742 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:48,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:48,459 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2023-11-29 05:47:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 05:47:48,460 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-29 05:47:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:48,460 INFO L225 Difference]: With dead ends: 76 [2023-11-29 05:47:48,460 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 05:47:48,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 05:47:48,462 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:48,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 62 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:47:48,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 05:47:48,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2023-11-29 05:47:48,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:48,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2023-11-29 05:47:48,491 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 22 [2023-11-29 05:47:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:48,491 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2023-11-29 05:47:48,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:48,492 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2023-11-29 05:47:48,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 05:47:48,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:48,493 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:48,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 05:47:48,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:47:48,695 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:48,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:48,696 INFO L85 PathProgramCache]: Analyzing trace with hash 493700754, now seen corresponding path program 12 times [2023-11-29 05:47:48,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:48,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225320095] [2023-11-29 05:47:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:48,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 05:47:48,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:48,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225320095] [2023-11-29 05:47:48,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225320095] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:48,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113141416] [2023-11-29 05:47:48,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:47:48,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:48,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:48,929 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:48,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:47:49,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 05:47:49,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:49,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:47:49,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 05:47:49,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 05:47:49,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113141416] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:49,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:49,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2023-11-29 05:47:49,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292767800] [2023-11-29 05:47:49,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:49,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:47:49,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:49,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:47:49,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:47:49,203 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:49,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:49,355 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2023-11-29 05:47:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:47:49,355 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-29 05:47:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:49,356 INFO L225 Difference]: With dead ends: 73 [2023-11-29 05:47:49,356 INFO L226 Difference]: Without dead ends: 63 [2023-11-29 05:47:49,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 15 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:47:49,357 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:49,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 55 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:47:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-29 05:47:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2023-11-29 05:47:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 57 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2023-11-29 05:47:49,392 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 23 [2023-11-29 05:47:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:49,392 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2023-11-29 05:47:49,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:49,392 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2023-11-29 05:47:49,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 05:47:49,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:49,393 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:49,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:47:49,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:47:49,595 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:49,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:49,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1380429246, now seen corresponding path program 13 times [2023-11-29 05:47:49,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:49,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336988506] [2023-11-29 05:47:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:49,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:47:49,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:49,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336988506] [2023-11-29 05:47:49,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336988506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:49,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156519101] [2023-11-29 05:47:49,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:47:49,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:49,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:49,826 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:49,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:47:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:49,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 05:47:49,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:49,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:47:50,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156519101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:50,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:50,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 30 [2023-11-29 05:47:50,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917605822] [2023-11-29 05:47:50,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:50,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 05:47:50,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:50,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 05:47:50,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2023-11-29 05:47:50,208 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:51,104 INFO L93 Difference]: Finished difference Result 159 states and 187 transitions. [2023-11-29 05:47:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 05:47:51,105 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-29 05:47:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:51,106 INFO L225 Difference]: With dead ends: 159 [2023-11-29 05:47:51,106 INFO L226 Difference]: Without dead ends: 133 [2023-11-29 05:47:51,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=614, Invalid=1936, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 05:47:51,108 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 136 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:51,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 74 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:47:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-29 05:47:51,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 55. [2023-11-29 05:47:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2023-11-29 05:47:51,134 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 23 [2023-11-29 05:47:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:51,135 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2023-11-29 05:47:51,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2023-11-29 05:47:51,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 05:47:51,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:51,136 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:51,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:47:51,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:47:51,336 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:51,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:51,336 INFO L85 PathProgramCache]: Analyzing trace with hash -553341822, now seen corresponding path program 14 times [2023-11-29 05:47:51,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:51,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91650837] [2023-11-29 05:47:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:51,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:47:51,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:51,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91650837] [2023-11-29 05:47:51,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91650837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:51,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123130408] [2023-11-29 05:47:51,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:47:51,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:51,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:51,565 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:51,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:47:51,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:47:51,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:51,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 05:47:51,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:47:51,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:47:51,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123130408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:51,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:51,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2023-11-29 05:47:51,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971409795] [2023-11-29 05:47:51,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:51,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:47:51,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:51,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:47:51,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:47:51,803 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:51,968 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2023-11-29 05:47:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:47:51,968 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-29 05:47:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:51,969 INFO L225 Difference]: With dead ends: 84 [2023-11-29 05:47:51,969 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 05:47:51,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 17 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:47:51,970 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:51,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 77 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:47:51,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 05:47:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2023-11-29 05:47:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2023-11-29 05:47:52,007 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 26 [2023-11-29 05:47:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:52,007 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2023-11-29 05:47:52,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:52,008 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2023-11-29 05:47:52,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 05:47:52,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:52,009 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:52,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:47:52,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:52,209 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:52,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:52,209 INFO L85 PathProgramCache]: Analyzing trace with hash 150295873, now seen corresponding path program 15 times [2023-11-29 05:47:52,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:52,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975683711] [2023-11-29 05:47:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:52,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:47:52,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:52,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975683711] [2023-11-29 05:47:52,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975683711] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:52,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309310631] [2023-11-29 05:47:52,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:47:52,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:52,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:52,427 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:52,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:47:52,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:47:52,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:52,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 05:47:52,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 05:47:52,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 05:47:53,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309310631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:53,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:53,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 34 [2023-11-29 05:47:53,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805772762] [2023-11-29 05:47:53,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:53,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 05:47:53,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:53,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 05:47:53,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 05:47:53,106 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:55,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:55,996 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2023-11-29 05:47:55,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-29 05:47:55,997 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-29 05:47:55,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:55,997 INFO L225 Difference]: With dead ends: 124 [2023-11-29 05:47:55,997 INFO L226 Difference]: Without dead ends: 82 [2023-11-29 05:47:56,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=561, Invalid=4551, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 05:47:56,000 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:56,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 169 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:47:56,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-29 05:47:56,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2023-11-29 05:47:56,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 70 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2023-11-29 05:47:56,042 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 26 [2023-11-29 05:47:56,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:56,042 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2023-11-29 05:47:56,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:56,042 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2023-11-29 05:47:56,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 05:47:56,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:56,043 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:56,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:47:56,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:56,244 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:56,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:56,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2120989967, now seen corresponding path program 16 times [2023-11-29 05:47:56,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:56,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393845188] [2023-11-29 05:47:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:56,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 05:47:56,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:56,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393845188] [2023-11-29 05:47:56,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393845188] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:56,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459988412] [2023-11-29 05:47:56,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:47:56,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:56,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:56,478 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:56,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:47:56,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:47:56,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:56,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 05:47:56,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:56,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 05:47:56,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459988412] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:56,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:56,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 14] total 36 [2023-11-29 05:47:56,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265768427] [2023-11-29 05:47:56,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:56,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 05:47:56,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:56,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 05:47:56,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=990, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 05:47:56,991 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 36 states, 36 states have (on average 1.5) internal successors, (54), 36 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:58,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:58,596 INFO L93 Difference]: Finished difference Result 196 states and 229 transitions. [2023-11-29 05:47:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 05:47:58,596 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5) internal successors, (54), 36 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 05:47:58,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:58,597 INFO L225 Difference]: With dead ends: 196 [2023-11-29 05:47:58,598 INFO L226 Difference]: Without dead ends: 184 [2023-11-29 05:47:58,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1006, Invalid=2900, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 05:47:58,599 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 176 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:58,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 141 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:47:58,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-29 05:47:58,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 78. [2023-11-29 05:47:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 77 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2023-11-29 05:47:58,644 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 27 [2023-11-29 05:47:58,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:58,644 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2023-11-29 05:47:58,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5) internal successors, (54), 36 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2023-11-29 05:47:58,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 05:47:58,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:58,645 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:58,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 05:47:58,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 05:47:58,845 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:58,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:58,846 INFO L85 PathProgramCache]: Analyzing trace with hash 5440530, now seen corresponding path program 17 times [2023-11-29 05:47:58,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:58,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027372921] [2023-11-29 05:47:58,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:58,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 05:47:59,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:59,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027372921] [2023-11-29 05:47:59,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027372921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:59,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185149551] [2023-11-29 05:47:59,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:47:59,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:59,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:59,113 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:59,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:47:59,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 05:47:59,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:59,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 05:47:59,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 05:47:59,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 05:47:59,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185149551] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:59,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:59,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2023-11-29 05:47:59,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610382038] [2023-11-29 05:47:59,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:59,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:47:59,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:59,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:47:59,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:47:59,665 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:59,878 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2023-11-29 05:47:59,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:47:59,878 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-29 05:47:59,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:59,879 INFO L225 Difference]: With dead ends: 118 [2023-11-29 05:47:59,879 INFO L226 Difference]: Without dead ends: 106 [2023-11-29 05:47:59,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 19 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:47:59,880 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:59,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 95 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:47:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-29 05:47:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 86. [2023-11-29 05:47:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 85 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2023-11-29 05:47:59,930 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 29 [2023-11-29 05:47:59,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:59,930 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2023-11-29 05:47:59,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:59,930 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2023-11-29 05:47:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 05:47:59,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:59,931 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:59,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 05:48:00,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 05:48:00,131 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:00,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:00,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1873400144, now seen corresponding path program 18 times [2023-11-29 05:48:00,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:00,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216939764] [2023-11-29 05:48:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:00,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 05:48:00,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:00,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216939764] [2023-11-29 05:48:00,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216939764] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:00,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839271855] [2023-11-29 05:48:00,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:48:00,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:00,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:00,426 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:00,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:48:00,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-29 05:48:00,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:48:00,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 05:48:00,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 05:48:00,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:48:01,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839271855] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:01,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:01,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 16] total 40 [2023-11-29 05:48:01,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618973185] [2023-11-29 05:48:01,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:01,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 05:48:01,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:01,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 05:48:01,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 05:48:01,193 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:05,133 INFO L93 Difference]: Finished difference Result 156 states and 186 transitions. [2023-11-29 05:48:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 05:48:05,133 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-29 05:48:05,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:05,134 INFO L225 Difference]: With dead ends: 156 [2023-11-29 05:48:05,134 INFO L226 Difference]: Without dead ends: 121 [2023-11-29 05:48:05,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=684, Invalid=5322, Unknown=0, NotChecked=0, Total=6006 [2023-11-29 05:48:05,136 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:05,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 258 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:48:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-29 05:48:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 108. [2023-11-29 05:48:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 107 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2023-11-29 05:48:05,207 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 30 [2023-11-29 05:48:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:05,207 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2023-11-29 05:48:05,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2023-11-29 05:48:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 05:48:05,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:05,207 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:48:05,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 05:48:05,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 05:48:05,408 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:05,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:05,408 INFO L85 PathProgramCache]: Analyzing trace with hash -474389534, now seen corresponding path program 19 times [2023-11-29 05:48:05,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:05,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980382675] [2023-11-29 05:48:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:05,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:48:05,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:05,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980382675] [2023-11-29 05:48:05,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980382675] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:05,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360685568] [2023-11-29 05:48:05,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:48:05,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:05,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:05,746 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:05,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 05:48:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:05,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 05:48:05,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:48:05,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 05:48:06,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360685568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:06,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:06,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 16] total 42 [2023-11-29 05:48:06,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801226594] [2023-11-29 05:48:06,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:06,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 05:48:06,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:06,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 05:48:06,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1365, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 05:48:06,413 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:09,960 INFO L93 Difference]: Finished difference Result 273 states and 315 transitions. [2023-11-29 05:48:09,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-29 05:48:09,960 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-29 05:48:09,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:09,962 INFO L225 Difference]: With dead ends: 273 [2023-11-29 05:48:09,962 INFO L226 Difference]: Without dead ends: 239 [2023-11-29 05:48:09,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1884, Invalid=5948, Unknown=0, NotChecked=0, Total=7832 [2023-11-29 05:48:09,964 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 361 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:09,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 184 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:48:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-11-29 05:48:10,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 101. [2023-11-29 05:48:10,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.14) internal successors, (114), 100 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 114 transitions. [2023-11-29 05:48:10,033 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 114 transitions. Word has length 31 [2023-11-29 05:48:10,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:10,033 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 114 transitions. [2023-11-29 05:48:10,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:10,034 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 114 transitions. [2023-11-29 05:48:10,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 05:48:10,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:10,034 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:48:10,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 05:48:10,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 05:48:10,235 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:10,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:10,235 INFO L85 PathProgramCache]: Analyzing trace with hash -2115600766, now seen corresponding path program 20 times [2023-11-29 05:48:10,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:10,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132509847] [2023-11-29 05:48:10,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:10,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 05:48:10,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:10,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132509847] [2023-11-29 05:48:10,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132509847] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:10,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476612346] [2023-11-29 05:48:10,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:48:10,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:10,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:10,573 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:10,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 05:48:10,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:48:10,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:48:10,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 05:48:10,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 05:48:10,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 05:48:10,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476612346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:10,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:10,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 13 [2023-11-29 05:48:10,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271171141] [2023-11-29 05:48:10,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:10,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:48:10,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:10,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:48:10,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:48:10,939 INFO L87 Difference]: Start difference. First operand 101 states and 114 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:11,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:11,237 INFO L93 Difference]: Finished difference Result 145 states and 160 transitions. [2023-11-29 05:48:11,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:48:11,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-29 05:48:11,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:11,238 INFO L225 Difference]: With dead ends: 145 [2023-11-29 05:48:11,238 INFO L226 Difference]: Without dead ends: 132 [2023-11-29 05:48:11,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 21 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:48:11,239 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:11,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 105 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:48:11,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-29 05:48:11,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 110. [2023-11-29 05:48:11,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1376146788990826) internal successors, (124), 109 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2023-11-29 05:48:11,318 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 32 [2023-11-29 05:48:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:11,318 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2023-11-29 05:48:11,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2023-11-29 05:48:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 05:48:11,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:11,319 INFO L195 NwaCegarLoop]: trace histogram [12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:48:11,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 05:48:11,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:11,519 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:11,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:11,520 INFO L85 PathProgramCache]: Analyzing trace with hash -227295408, now seen corresponding path program 21 times [2023-11-29 05:48:11,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:11,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451982124] [2023-11-29 05:48:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:11,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 40 proven. 56 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 05:48:11,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:11,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451982124] [2023-11-29 05:48:11,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451982124] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:11,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976775538] [2023-11-29 05:48:11,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:48:11,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:11,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:11,765 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:11,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 05:48:11,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-29 05:48:11,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:48:11,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 05:48:11,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 40 proven. 56 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 05:48:12,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 40 proven. 56 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 05:48:12,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976775538] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:12,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:12,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 42 [2023-11-29 05:48:12,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028985027] [2023-11-29 05:48:12,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:12,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 05:48:12,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:12,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 05:48:12,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 05:48:12,535 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:18,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:18,979 INFO L93 Difference]: Finished difference Result 278 states and 310 transitions. [2023-11-29 05:48:18,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-29 05:48:18,979 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-29 05:48:18,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:18,981 INFO L225 Difference]: With dead ends: 278 [2023-11-29 05:48:18,981 INFO L226 Difference]: Without dead ends: 252 [2023-11-29 05:48:18,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=975, Invalid=3855, Unknown=0, NotChecked=0, Total=4830 [2023-11-29 05:48:18,983 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 288 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:18,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 140 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:48:18,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-29 05:48:19,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 89. [2023-11-29 05:48:19,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 88 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:19,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2023-11-29 05:48:19,053 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 34 [2023-11-29 05:48:19,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:19,054 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2023-11-29 05:48:19,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2023-11-29 05:48:19,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 05:48:19,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:19,054 INFO L195 NwaCegarLoop]: trace histogram [11, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:48:19,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 05:48:19,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 05:48:19,255 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:19,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:19,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2003505183, now seen corresponding path program 22 times [2023-11-29 05:48:19,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:19,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743093653] [2023-11-29 05:48:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:19,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 05:48:19,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:19,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743093653] [2023-11-29 05:48:19,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743093653] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:19,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605591697] [2023-11-29 05:48:19,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:48:19,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:19,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:19,594 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:19,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 05:48:19,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:48:19,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:48:19,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 05:48:19,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 05:48:19,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 05:48:20,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605591697] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:20,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:20,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 18] total 46 [2023-11-29 05:48:20,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981140149] [2023-11-29 05:48:20,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:20,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-29 05:48:20,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:20,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-29 05:48:20,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1810, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 05:48:20,324 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 46 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:31,253 INFO L93 Difference]: Finished difference Result 164 states and 195 transitions. [2023-11-29 05:48:31,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-11-29 05:48:31,253 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-29 05:48:31,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:31,254 INFO L225 Difference]: With dead ends: 164 [2023-11-29 05:48:31,254 INFO L226 Difference]: Without dead ends: 131 [2023-11-29 05:48:31,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=960, Invalid=8546, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 05:48:31,258 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 78 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:31,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 207 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1685 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 05:48:31,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-29 05:48:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 115. [2023-11-29 05:48:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.131578947368421) internal successors, (129), 114 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:31,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2023-11-29 05:48:31,357 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 34 [2023-11-29 05:48:31,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:31,357 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2023-11-29 05:48:31,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:31,358 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2023-11-29 05:48:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 05:48:31,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:31,358 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:48:31,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-29 05:48:31,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 05:48:31,559 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:31,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:31,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2057068142, now seen corresponding path program 23 times [2023-11-29 05:48:31,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:31,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445096550] [2023-11-29 05:48:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:31,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:48:31,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:31,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445096550] [2023-11-29 05:48:31,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445096550] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:31,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825291486] [2023-11-29 05:48:31,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:48:31,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:31,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:31,871 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:31,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 05:48:33,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 05:48:33,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:48:33,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 05:48:33,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:48:33,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:48:33,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825291486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:33,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:33,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2023-11-29 05:48:33,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42796730] [2023-11-29 05:48:33,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:33,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:48:33,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:33,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:48:33,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:48:33,605 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:33,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:33,918 INFO L93 Difference]: Finished difference Result 152 states and 167 transitions. [2023-11-29 05:48:33,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:48:33,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-29 05:48:33,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:33,919 INFO L225 Difference]: With dead ends: 152 [2023-11-29 05:48:33,919 INFO L226 Difference]: Without dead ends: 138 [2023-11-29 05:48:33,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 23 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:48:33,920 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:33,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 105 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:48:33,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-29 05:48:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 125. [2023-11-29 05:48:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1290322580645162) internal successors, (140), 124 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:34,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 140 transitions. [2023-11-29 05:48:34,033 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 140 transitions. Word has length 35 [2023-11-29 05:48:34,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:34,033 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 140 transitions. [2023-11-29 05:48:34,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:34,033 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 140 transitions. [2023-11-29 05:48:34,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 05:48:34,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:34,033 INFO L195 NwaCegarLoop]: trace histogram [12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:48:34,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 05:48:34,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 05:48:34,234 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:34,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:34,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1205491330, now seen corresponding path program 24 times [2023-11-29 05:48:34,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:34,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828132119] [2023-11-29 05:48:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:34,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 36 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 05:48:34,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:34,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828132119] [2023-11-29 05:48:34,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828132119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:34,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523049595] [2023-11-29 05:48:34,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:48:34,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:34,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:34,495 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:34,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 05:48:34,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-29 05:48:34,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:48:34,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 05:48:34,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 36 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 05:48:34,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 36 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 05:48:35,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523049595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:35,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:35,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 47 [2023-11-29 05:48:35,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085339910] [2023-11-29 05:48:35,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:35,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 05:48:35,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:35,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 05:48:35,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 05:48:35,439 INFO L87 Difference]: Start difference. First operand 125 states and 140 transitions. Second operand has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:47,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:47,587 INFO L93 Difference]: Finished difference Result 340 states and 377 transitions. [2023-11-29 05:48:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-29 05:48:47,588 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-29 05:48:47,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:47,589 INFO L225 Difference]: With dead ends: 340 [2023-11-29 05:48:47,590 INFO L226 Difference]: Without dead ends: 313 [2023-11-29 05:48:47,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1366, Invalid=5440, Unknown=0, NotChecked=0, Total=6806 [2023-11-29 05:48:47,592 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 238 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:47,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 136 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 05:48:47,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-11-29 05:48:47,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 103. [2023-11-29 05:48:47,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1274509803921569) internal successors, (115), 102 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2023-11-29 05:48:47,704 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 36 [2023-11-29 05:48:47,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:47,704 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2023-11-29 05:48:47,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:47,704 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2023-11-29 05:48:47,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 05:48:47,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:47,705 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:48:47,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 05:48:47,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 05:48:47,905 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:47,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:47,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2120955151, now seen corresponding path program 25 times [2023-11-29 05:48:47,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:47,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116627065] [2023-11-29 05:48:47,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:47,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:48:48,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:48,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116627065] [2023-11-29 05:48:48,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116627065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:48,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306576681] [2023-11-29 05:48:48,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:48:48,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:48,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:48,293 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:48,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 05:48:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:48,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 05:48:48,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:48:48,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 05:48:49,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306576681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:49,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:49,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 20] total 51 [2023-11-29 05:48:49,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222745249] [2023-11-29 05:48:49,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:49,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 05:48:49,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:49,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 05:48:49,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=2242, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 05:48:49,212 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:07,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:07,950 INFO L93 Difference]: Finished difference Result 178 states and 206 transitions. [2023-11-29 05:49:07,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-29 05:49:07,951 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-29 05:49:07,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:07,952 INFO L225 Difference]: With dead ends: 178 [2023-11-29 05:49:07,952 INFO L226 Difference]: Without dead ends: 143 [2023-11-29 05:49:07,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2685 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=1170, Invalid=10820, Unknown=0, NotChecked=0, Total=11990 [2023-11-29 05:49:07,953 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 91 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:07,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 215 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1882 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 05:49:07,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-29 05:49:08,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 126. [2023-11-29 05:49:08,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.12) internal successors, (140), 125 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 140 transitions. [2023-11-29 05:49:08,091 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 140 transitions. Word has length 37 [2023-11-29 05:49:08,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:08,091 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 140 transitions. [2023-11-29 05:49:08,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:08,091 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 140 transitions. [2023-11-29 05:49:08,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 05:49:08,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:08,092 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:08,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 05:49:08,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:08,293 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:08,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:08,293 INFO L85 PathProgramCache]: Analyzing trace with hash -524046206, now seen corresponding path program 26 times [2023-11-29 05:49:08,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:08,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812278580] [2023-11-29 05:49:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:08,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 05:49:08,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:08,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812278580] [2023-11-29 05:49:08,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812278580] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:49:08,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060849354] [2023-11-29 05:49:08,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:49:08,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:08,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:08,681 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:08,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 05:49:08,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:49:08,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:49:08,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 05:49:08,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 05:49:08,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:49:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 05:49:09,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060849354] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:49:09,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:49:09,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 15 [2023-11-29 05:49:09,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018867024] [2023-11-29 05:49:09,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:49:09,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:49:09,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:09,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:49:09,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:49:09,086 INFO L87 Difference]: Start difference. First operand 126 states and 140 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:09,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:09,515 INFO L93 Difference]: Finished difference Result 166 states and 181 transitions. [2023-11-29 05:49:09,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:49:09,515 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-29 05:49:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:09,516 INFO L225 Difference]: With dead ends: 166 [2023-11-29 05:49:09,516 INFO L226 Difference]: Without dead ends: 151 [2023-11-29 05:49:09,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 60 SyntacticMatches, 25 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:49:09,517 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:09,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 123 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:49:09,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-29 05:49:09,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 137. [2023-11-29 05:49:09,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1176470588235294) internal successors, (152), 136 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:09,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2023-11-29 05:49:09,668 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 38 [2023-11-29 05:49:09,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:09,668 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2023-11-29 05:49:09,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:09,668 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2023-11-29 05:49:09,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 05:49:09,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:09,669 INFO L195 NwaCegarLoop]: trace histogram [14, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:09,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 05:49:09,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 05:49:09,869 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:09,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:09,870 INFO L85 PathProgramCache]: Analyzing trace with hash -888901104, now seen corresponding path program 27 times [2023-11-29 05:49:09,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:09,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487243939] [2023-11-29 05:49:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:09,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 50 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 05:49:10,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:10,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487243939] [2023-11-29 05:49:10,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487243939] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:49:10,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865375935] [2023-11-29 05:49:10,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:49:10,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:10,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:10,201 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:10,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 05:49:10,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-29 05:49:10,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:49:10,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 05:49:10,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 50 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 05:49:11,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:49:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 50 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 05:49:11,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865375935] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:49:11,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:49:11,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 22] total 52 [2023-11-29 05:49:11,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635963583] [2023-11-29 05:49:11,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:49:11,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-29 05:49:11,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:11,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-29 05:49:11,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2231, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 05:49:11,721 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand has 52 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:30,082 INFO L93 Difference]: Finished difference Result 404 states and 445 transitions. [2023-11-29 05:49:30,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-11-29 05:49:30,082 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-29 05:49:30,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:30,084 INFO L225 Difference]: With dead ends: 404 [2023-11-29 05:49:30,084 INFO L226 Difference]: Without dead ends: 374 [2023-11-29 05:49:30,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=1861, Invalid=7451, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 05:49:30,085 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 388 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:30,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 145 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 05:49:30,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-29 05:49:30,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 112. [2023-11-29 05:49:30,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.117117117117117) internal successors, (124), 111 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:30,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2023-11-29 05:49:30,239 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 40 [2023-11-29 05:49:30,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:30,240 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2023-11-29 05:49:30,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:30,240 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2023-11-29 05:49:30,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 05:49:30,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:30,240 INFO L195 NwaCegarLoop]: trace histogram [13, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:30,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 05:49:30,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 05:49:30,441 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:30,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:30,441 INFO L85 PathProgramCache]: Analyzing trace with hash 109105761, now seen corresponding path program 28 times [2023-11-29 05:49:30,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:30,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314764173] [2023-11-29 05:49:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:30,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 05:49:30,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:30,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314764173] [2023-11-29 05:49:30,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314764173] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:49:30,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185589155] [2023-11-29 05:49:30,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:49:30,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:30,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:30,811 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:30,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 05:49:30,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:49:30,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:49:30,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 05:49:30,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 05:49:31,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:49:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-29 05:49:31,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185589155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:49:31,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:49:31,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 22] total 56 [2023-11-29 05:49:31,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802294526] [2023-11-29 05:49:31,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:49:31,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 05:49:31,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:31,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 05:49:31,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=2720, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 05:49:31,737 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:00,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:50:00,783 INFO L93 Difference]: Finished difference Result 194 states and 224 transitions. [2023-11-29 05:50:00,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-11-29 05:50:00,783 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-29 05:50:00,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:50:00,784 INFO L225 Difference]: With dead ends: 194 [2023-11-29 05:50:00,784 INFO L226 Difference]: Without dead ends: 156 [2023-11-29 05:50:00,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3352 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=1402, Invalid=13360, Unknown=0, NotChecked=0, Total=14762 [2023-11-29 05:50:00,785 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 96 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 2263 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:50:00,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 231 Invalid, 2362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2263 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-11-29 05:50:00,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-29 05:50:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 138. [2023-11-29 05:50:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.1094890510948905) internal successors, (152), 137 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2023-11-29 05:50:00,961 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 40 [2023-11-29 05:50:00,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:50:00,961 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2023-11-29 05:50:00,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2023-11-29 05:50:00,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 05:50:00,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:50:00,962 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:50:00,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-29 05:50:01,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:01,163 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:50:01,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:01,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1497686254, now seen corresponding path program 29 times [2023-11-29 05:50:01,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:50:01,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306404753] [2023-11-29 05:50:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:01,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:50:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:50:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 05:50:01,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:50:01,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306404753] [2023-11-29 05:50:01,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306404753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:50:01,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959789224] [2023-11-29 05:50:01,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:50:01,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:01,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:50:01,492 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:50:01,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 05:50:08,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-29 05:50:08,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:50:08,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-29 05:50:08,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:50:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 56 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:50:10,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:50:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 05:50:10,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959789224] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:50:10,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:50:10,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 15] total 23 [2023-11-29 05:50:10,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588113916] [2023-11-29 05:50:10,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:50:10,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:50:10,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:50:10,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:50:10,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:50:10,569 INFO L87 Difference]: Start difference. First operand 138 states and 152 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:50:11,762 INFO L93 Difference]: Finished difference Result 209 states and 237 transitions. [2023-11-29 05:50:11,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:50:11,762 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-29 05:50:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:50:11,763 INFO L225 Difference]: With dead ends: 209 [2023-11-29 05:50:11,763 INFO L226 Difference]: Without dead ends: 193 [2023-11-29 05:50:11,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 58 SyntacticMatches, 27 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:50:11,764 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:50:11,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 130 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 05:50:11,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-29 05:50:11,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 150. [2023-11-29 05:50:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.1073825503355705) internal successors, (165), 149 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2023-11-29 05:50:11,971 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 41 [2023-11-29 05:50:11,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:50:11,971 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2023-11-29 05:50:11,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:11,971 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2023-11-29 05:50:11,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 05:50:11,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:50:11,971 INFO L195 NwaCegarLoop]: trace histogram [14, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:50:11,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 05:50:12,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:12,172 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:50:12,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:12,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1929578737, now seen corresponding path program 30 times [2023-11-29 05:50:12,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:50:12,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18662423] [2023-11-29 05:50:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:12,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:50:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:50:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 05:50:12,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:50:12,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18662423] [2023-11-29 05:50:12,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18662423] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:50:12,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699325185] [2023-11-29 05:50:12,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:50:12,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:12,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:50:12,586 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:50:12,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 05:50:12,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 05:50:12,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:50:12,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-29 05:50:12,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:50:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 05:50:13,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:50:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-29 05:50:14,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699325185] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:50:14,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:50:14,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 24] total 61 [2023-11-29 05:50:14,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028379058] [2023-11-29 05:50:14,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:50:14,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-29 05:50:14,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:50:14,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-29 05:50:14,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=3244, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 05:50:14,076 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 61 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:54,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 05:51:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:51:04,794 INFO L93 Difference]: Finished difference Result 246 states and 282 transitions. [2023-11-29 05:51:04,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2023-11-29 05:51:04,795 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-29 05:51:04,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:51:04,796 INFO L225 Difference]: With dead ends: 246 [2023-11-29 05:51:04,796 INFO L226 Difference]: Without dead ends: 195 [2023-11-29 05:51:04,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4709 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=1787, Invalid=17953, Unknown=0, NotChecked=0, Total=19740 [2023-11-29 05:51:04,798 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 138 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 3154 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 3259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:51:04,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 333 Invalid, 3259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3154 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2023-11-29 05:51:04,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-29 05:51:05,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 177. [2023-11-29 05:51:05,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.1022727272727273) internal successors, (194), 176 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:51:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 194 transitions. [2023-11-29 05:51:05,117 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 194 transitions. Word has length 43 [2023-11-29 05:51:05,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:51:05,117 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 194 transitions. [2023-11-29 05:51:05,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:51:05,117 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 194 transitions. [2023-11-29 05:51:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 05:51:05,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:51:05,118 INFO L195 NwaCegarLoop]: trace histogram [16, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:51:05,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 05:51:05,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:51:05,318 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:51:05,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:51:05,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1846697090, now seen corresponding path program 31 times [2023-11-29 05:51:05,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:51:05,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746110234] [2023-11-29 05:51:05,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:51:05,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:51:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:51:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 66 proven. 110 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 05:51:05,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:51:05,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746110234] [2023-11-29 05:51:05,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746110234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:51:05,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405105556] [2023-11-29 05:51:05,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:51:05,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:51:05,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:51:05,640 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:51:05,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 05:51:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:51:05,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 05:51:05,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:51:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 66 proven. 110 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 05:51:05,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:51:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 66 proven. 110 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 05:51:06,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405105556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:51:06,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:51:06,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 24] total 57 [2023-11-29 05:51:06,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799694266] [2023-11-29 05:51:06,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:51:06,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-29 05:51:06,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:51:06,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-29 05:51:06,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=2696, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 05:51:06,762 INFO L87 Difference]: Start difference. First operand 177 states and 194 transitions. Second operand has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:51:41,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:51:41,381 INFO L93 Difference]: Finished difference Result 420 states and 456 transitions. [2023-11-29 05:51:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-29 05:51:41,382 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-29 05:51:41,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:51:41,383 INFO L225 Difference]: With dead ends: 420 [2023-11-29 05:51:41,383 INFO L226 Difference]: Without dead ends: 387 [2023-11-29 05:51:41,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3267 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=2476, Invalid=9956, Unknown=0, NotChecked=0, Total=12432 [2023-11-29 05:51:41,384 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 421 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:51:41,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 187 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-29 05:51:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-11-29 05:51:41,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 150. [2023-11-29 05:51:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.1006711409395973) internal successors, (164), 149 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:51:41,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 164 transitions. [2023-11-29 05:51:41,617 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 164 transitions. Word has length 44 [2023-11-29 05:51:41,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:51:41,617 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 164 transitions. [2023-11-29 05:51:41,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:51:41,618 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 164 transitions. [2023-11-29 05:51:41,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 05:51:41,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:51:41,618 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:51:41,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 05:51:41,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 05:51:41,819 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:51:41,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:51:41,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1453309310, now seen corresponding path program 32 times [2023-11-29 05:51:41,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:51:41,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049428507] [2023-11-29 05:51:41,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:51:41,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:51:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:51:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 05:51:42,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:51:42,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049428507] [2023-11-29 05:51:42,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049428507] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:51:42,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883037133] [2023-11-29 05:51:42,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:51:42,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:51:42,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:51:42,308 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:51:42,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 05:51:42,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:51:42,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:51:42,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-29 05:51:42,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:51:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 05:51:42,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:51:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 05:51:42,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883037133] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:51:42,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:51:42,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 17 [2023-11-29 05:51:42,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568110873] [2023-11-29 05:51:42,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:51:42,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:51:42,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:51:42,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:51:42,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:51:42,847 INFO L87 Difference]: Start difference. First operand 150 states and 164 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:51:43,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:51:43,509 INFO L93 Difference]: Finished difference Result 196 states and 211 transitions. [2023-11-29 05:51:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:51:43,509 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-29 05:51:43,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:51:43,510 INFO L225 Difference]: With dead ends: 196 [2023-11-29 05:51:43,510 INFO L226 Difference]: Without dead ends: 179 [2023-11-29 05:51:43,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 29 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:51:43,511 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:51:43,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 141 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:51:43,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-29 05:51:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 163. [2023-11-29 05:51:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0987654320987654) internal successors, (178), 162 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:51:43,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 178 transitions. [2023-11-29 05:51:43,770 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 178 transitions. Word has length 44 [2023-11-29 05:51:43,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:51:43,771 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 178 transitions. [2023-11-29 05:51:43,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:51:43,771 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 178 transitions. [2023-11-29 05:51:43,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 05:51:43,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:51:43,771 INFO L195 NwaCegarLoop]: trace histogram [15, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:51:43,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 05:51:43,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 05:51:43,972 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:51:43,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:51:43,972 INFO L85 PathProgramCache]: Analyzing trace with hash 858117345, now seen corresponding path program 33 times [2023-11-29 05:51:43,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:51:43,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771398438] [2023-11-29 05:51:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:51:43,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:51:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:51:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 05:51:44,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:51:44,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771398438] [2023-11-29 05:51:44,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771398438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:51:44,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481336783] [2023-11-29 05:51:44,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:51:44,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:51:44,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:51:44,419 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:51:44,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edea1a7d-5dc9-4126-ba51-a76c7ecf5b10/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 05:51:45,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-29 05:51:45,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:51:45,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 05:51:45,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:51:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-29 05:51:46,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:51:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-29 05:51:48,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481336783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:51:48,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:51:48,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 80 [2023-11-29 05:51:48,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160201134] [2023-11-29 05:51:48,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:51:48,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-11-29 05:51:48,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:51:48,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-11-29 05:51:48,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=5178, Unknown=0, NotChecked=0, Total=6320 [2023-11-29 05:51:48,063 INFO L87 Difference]: Start difference. First operand 163 states and 178 transitions. Second operand has 80 states, 80 states have (on average 1.125) internal successors, (90), 80 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:52:11,426 WARN L293 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 54 DAG size of output: 54 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 05:53:58,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 05:54:15,334 WARN L293 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 58 DAG size of output: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 05:55:00,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 05:56:02,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 05:58:28,821 WARN L293 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 58 DAG size of output: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)