./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/tcpy.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_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/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_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/tcpy.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/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_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/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 a747677fdea16741fbb3fca3d9510254677728ef5906b9bf8e219064accd3a39 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:10:21,192 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:10:21,253 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:10:21,258 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:10:21,259 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:10:21,281 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:10:21,282 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:10:21,282 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:10:21,283 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:10:21,283 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:10:21,284 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:10:21,284 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:10:21,285 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:10:21,285 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:10:21,286 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:10:21,286 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:10:21,287 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:10:21,288 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:10:21,288 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:10:21,288 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:10:21,289 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:10:21,290 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:10:21,290 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:10:21,291 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:10:21,291 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:10:21,291 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:10:21,292 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:10:21,292 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:10:21,293 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:10:21,293 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:10:21,293 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:10:21,294 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:10:21,294 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:10:21,294 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:10:21,295 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:10:21,295 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:10:21,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:10:21,295 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:10:21,295 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:10:21,296 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:10:21,296 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:10:21,296 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:10:21,296 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_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a747677fdea16741fbb3fca3d9510254677728ef5906b9bf8e219064accd3a39 [2023-11-29 05:10:21,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:10:21,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:10:21,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:10:21,509 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:10:21,509 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:10:21,511 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-tiling/tcpy.c [2023-11-29 05:10:24,249 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:10:24,396 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:10:24,397 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/sv-benchmarks/c/array-tiling/tcpy.c [2023-11-29 05:10:24,403 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/data/0f33be30c/810b6d17334040cc8d31579130cecac4/FLAG3bc8bc3ff [2023-11-29 05:10:24,416 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/data/0f33be30c/810b6d17334040cc8d31579130cecac4 [2023-11-29 05:10:24,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:10:24,422 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:10:24,423 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:10:24,423 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:10:24,427 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:10:24,427 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:10:24" (1/1) ... [2023-11-29 05:10:24,428 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7865983c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:24, skipping insertion in model container [2023-11-29 05:10:24,428 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:10:24" (1/1) ... [2023-11-29 05:10:24,449 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:10:24,601 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_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/sv-benchmarks/c/array-tiling/tcpy.c[395,408] [2023-11-29 05:10:24,620 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:10:24,630 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:10:24,643 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_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/sv-benchmarks/c/array-tiling/tcpy.c[395,408] [2023-11-29 05:10:24,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:10:24,666 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:10:24,666 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:24 WrapperNode [2023-11-29 05:10:24,666 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:10:24,667 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:10:24,668 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:10:24,668 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:10:24,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:24" (1/1) ... [2023-11-29 05:10:24,682 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:24" (1/1) ... [2023-11-29 05:10:24,703 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2023-11-29 05:10:24,704 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:10:24,705 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:10:24,705 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:10:24,705 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:10:24,716 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:24" (1/1) ... [2023-11-29 05:10:24,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:24" (1/1) ... [2023-11-29 05:10:24,718 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:24" (1/1) ... [2023-11-29 05:10:24,733 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 7, 3, 4]. 44 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 3 writes are split as follows [0, 0, 2, 1]. [2023-11-29 05:10:24,733 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:24" (1/1) ... [2023-11-29 05:10:24,733 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:24" (1/1) ... [2023-11-29 05:10:24,740 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:24" (1/1) ... [2023-11-29 05:10:24,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:24" (1/1) ... [2023-11-29 05:10:24,745 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:24" (1/1) ... [2023-11-29 05:10:24,746 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:24" (1/1) ... [2023-11-29 05:10:24,749 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:10:24,750 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:10:24,750 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:10:24,750 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:10:24,751 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:24" (1/1) ... [2023-11-29 05:10:24,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:10:24,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:24,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:10:24,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:10:24,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:10:24,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:10:24,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:10:24,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:10:24,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:10:24,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:10:24,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:10:24,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:10:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 05:10:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:10:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:10:24,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:10:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:10:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:10:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:10:24,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 05:10:24,886 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:10:24,888 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:10:25,025 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:10:25,057 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:10:25,057 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 05:10:25,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:10:25 BoogieIcfgContainer [2023-11-29 05:10:25,058 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:10:25,061 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:10:25,061 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:10:25,064 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:10:25,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:10:24" (1/3) ... [2023-11-29 05:10:25,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d4c6da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:10:25, skipping insertion in model container [2023-11-29 05:10:25,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:24" (2/3) ... [2023-11-29 05:10:25,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d4c6da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:10:25, skipping insertion in model container [2023-11-29 05:10:25,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:10:25" (3/3) ... [2023-11-29 05:10:25,067 INFO L112 eAbstractionObserver]: Analyzing ICFG tcpy.c [2023-11-29 05:10:25,092 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:10:25,093 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:10:25,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:10:25,137 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;@23b4e290, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:10:25,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:10:25,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 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 05:10:25,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 05:10:25,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:25,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:25,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:25,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:25,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1481934315, now seen corresponding path program 1 times [2023-11-29 05:10:25,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:25,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501104919] [2023-11-29 05:10:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:25,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:25,326 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 05:10:25,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:25,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501104919] [2023-11-29 05:10:25,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501104919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:10:25,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:10:25,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:10:25,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498034553] [2023-11-29 05:10:25,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:10:25,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 05:10:25,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:25,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 05:10:25,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:10:25,365 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:25,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:25,397 INFO L93 Difference]: Finished difference Result 31 states and 46 transitions. [2023-11-29 05:10:25,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 05:10:25,400 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-29 05:10:25,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:25,407 INFO L225 Difference]: With dead ends: 31 [2023-11-29 05:10:25,407 INFO L226 Difference]: Without dead ends: 13 [2023-11-29 05:10:25,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:10:25,413 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:25,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:10:25,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-29 05:10:25,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-29 05:10:25,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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 05:10:25,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-29 05:10:25,443 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2023-11-29 05:10:25,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:25,444 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-29 05:10:25,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-29 05:10:25,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 05:10:25,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:25,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:25,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:10:25,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:25,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:25,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1216766567, now seen corresponding path program 1 times [2023-11-29 05:10:25,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:25,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323201080] [2023-11-29 05:10:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:25,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:25,577 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 05:10:25,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:25,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323201080] [2023-11-29 05:10:25,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323201080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:10:25,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:10:25,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:10:25,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837336954] [2023-11-29 05:10:25,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:10:25,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:10:25,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:25,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:10:25,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:10:25,582 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:25,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:25,608 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-11-29 05:10:25,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:10:25,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-29 05:10:25,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:25,609 INFO L225 Difference]: With dead ends: 24 [2023-11-29 05:10:25,609 INFO L226 Difference]: Without dead ends: 14 [2023-11-29 05:10:25,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:10:25,611 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:25,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:10:25,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-29 05:10:25,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-29 05:10:25,615 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 05:10:25,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-11-29 05:10:25,616 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2023-11-29 05:10:25,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:25,616 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-11-29 05:10:25,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:25,617 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-11-29 05:10:25,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 05:10:25,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:25,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:25,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:10:25,618 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:25,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:25,618 INFO L85 PathProgramCache]: Analyzing trace with hash 821583593, now seen corresponding path program 1 times [2023-11-29 05:10:25,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:25,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478178119] [2023-11-29 05:10:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:25,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:25,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:25,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478178119] [2023-11-29 05:10:25,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478178119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:25,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362937641] [2023-11-29 05:10:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:25,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:25,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:25,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:25,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:10:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:25,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:10:25,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:25,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:25,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362937641] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:25,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:25,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 05:10:25,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944562485] [2023-11-29 05:10:25,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:25,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:10:25,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:25,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:10:25,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:10:25,903 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 05:10:25,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:25,942 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-11-29 05:10:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:10:25,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 12 [2023-11-29 05:10:25,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:25,943 INFO L225 Difference]: With dead ends: 25 [2023-11-29 05:10:25,943 INFO L226 Difference]: Without dead ends: 15 [2023-11-29 05:10:25,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:10:25,945 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:25,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:10:25,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-29 05:10:25,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-29 05:10:25,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 05:10:25,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-29 05:10:25,950 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2023-11-29 05:10:25,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:25,950 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-29 05:10:25,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 05:10:25,950 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-29 05:10:25,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 05:10:25,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:25,951 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:25,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:10:26,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:26,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:26,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:26,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1455813287, now seen corresponding path program 2 times [2023-11-29 05:10:26,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:26,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520495705] [2023-11-29 05:10:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:26,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:10:26,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:26,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520495705] [2023-11-29 05:10:26,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520495705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:10:26,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:10:26,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:10:26,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496172333] [2023-11-29 05:10:26,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:10:26,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:10:26,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:26,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:10:26,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:10:26,371 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 05:10:26,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:26,402 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-11-29 05:10:26,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:10:26,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 05:10:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:26,404 INFO L225 Difference]: With dead ends: 27 [2023-11-29 05:10:26,404 INFO L226 Difference]: Without dead ends: 21 [2023-11-29 05:10:26,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:10:26,405 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 11 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 05:10:26,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 11 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:10:26,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-29 05:10:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2023-11-29 05:10:26,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-11-29 05:10:26,417 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2023-11-29 05:10:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:26,417 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-11-29 05:10:26,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 05:10:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-29 05:10:26,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 05:10:26,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:26,418 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:26,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:10:26,419 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:26,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:26,419 INFO L85 PathProgramCache]: Analyzing trace with hash -891004250, now seen corresponding path program 1 times [2023-11-29 05:10:26,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:26,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698447497] [2023-11-29 05:10:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:26,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:10:26,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:26,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698447497] [2023-11-29 05:10:26,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698447497] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:26,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158199774] [2023-11-29 05:10:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:26,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:26,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:26,754 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:26,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:10:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:26,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 05:10:26,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:26,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 05:10:26,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:10:26,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 1 [2023-11-29 05:10:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:10:26,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:27,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2023-11-29 05:10:27,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 78 [2023-11-29 05:10:27,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2023-11-29 05:10:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:10:27,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158199774] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:27,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:27,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2023-11-29 05:10:27,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958550895] [2023-11-29 05:10:27,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:27,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:10:27,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:27,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:10:27,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:10:27,067 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 05:10:27,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:27,149 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2023-11-29 05:10:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:10:27,149 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 14 [2023-11-29 05:10:27,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:27,150 INFO L225 Difference]: With dead ends: 21 [2023-11-29 05:10:27,150 INFO L226 Difference]: Without dead ends: 19 [2023-11-29 05:10:27,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:10:27,151 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:27,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:10:27,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-29 05:10:27,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-11-29 05:10:27,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:27,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-11-29 05:10:27,158 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2023-11-29 05:10:27,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:27,158 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-11-29 05:10:27,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 05:10:27,158 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-11-29 05:10:27,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 05:10:27,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:27,159 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:27,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:10:27,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:27,366 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:27,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:27,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1004487102, now seen corresponding path program 1 times [2023-11-29 05:10:27,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:27,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102955546] [2023-11-29 05:10:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:27,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:27,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:27,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102955546] [2023-11-29 05:10:27,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102955546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:27,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766540465] [2023-11-29 05:10:27,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:27,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:27,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:27,918 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:27,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:10:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:28,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 05:10:28,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:28,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:10:28,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2023-11-29 05:10:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:28,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:28,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2023-11-29 05:10:28,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2023-11-29 05:10:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:28,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766540465] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:28,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:28,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 31 [2023-11-29 05:10:28,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488186883] [2023-11-29 05:10:28,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:28,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 05:10:28,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:28,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 05:10:28,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2023-11-29 05:10:28,662 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 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 05:10:29,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:29,292 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2023-11-29 05:10:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 05:10:29,293 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 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 05:10:29,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:29,294 INFO L225 Difference]: With dead ends: 66 [2023-11-29 05:10:29,294 INFO L226 Difference]: Without dead ends: 57 [2023-11-29 05:10:29,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=456, Invalid=1800, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 05:10:29,296 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 126 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:29,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 100 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:10:29,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-29 05:10:29,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2023-11-29 05:10:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 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 05:10:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-11-29 05:10:29,308 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 17 [2023-11-29 05:10:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:29,308 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-11-29 05:10:29,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 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 05:10:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-11-29 05:10:29,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 05:10:29,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:29,309 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:29,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:10:29,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:29,510 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:29,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:29,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1576853886, now seen corresponding path program 2 times [2023-11-29 05:10:29,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:29,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834644625] [2023-11-29 05:10:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:29,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:10:29,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:29,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834644625] [2023-11-29 05:10:29,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834644625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:29,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725736891] [2023-11-29 05:10:29,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:10:29,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:29,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:29,803 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:29,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:10:29,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:10:29,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:29,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:10:29,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:10:30,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:10:30,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725736891] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:30,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:30,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-11-29 05:10:30,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622131112] [2023-11-29 05:10:30,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:30,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 05:10:30,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:30,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 05:10:30,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:10:30,340 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 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 05:10:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:30,590 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2023-11-29 05:10:30,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:10:30,591 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 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 05:10:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:30,592 INFO L225 Difference]: With dead ends: 82 [2023-11-29 05:10:30,592 INFO L226 Difference]: Without dead ends: 70 [2023-11-29 05:10:30,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:10:30,593 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:30,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 101 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:10:30,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-29 05:10:30,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 36. [2023-11-29 05:10:30,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 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 05:10:30,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-11-29 05:10:30,606 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 19 [2023-11-29 05:10:30,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:30,606 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-11-29 05:10:30,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 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 05:10:30,607 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-11-29 05:10:30,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 05:10:30,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:30,608 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:30,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:10:30,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 05:10:30,813 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:30,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:30,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1859733887, now seen corresponding path program 3 times [2023-11-29 05:10:30,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:30,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471334216] [2023-11-29 05:10:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:30,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:10:31,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:31,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471334216] [2023-11-29 05:10:31,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471334216] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:31,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585017265] [2023-11-29 05:10:31,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:10:31,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:31,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:31,202 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:31,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:10:31,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:10:31,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:31,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 05:10:31,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:31,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:10:31,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-11-29 05:10:31,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:10:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:10:31,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:31,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2023-11-29 05:10:31,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 86 [2023-11-29 05:10:31,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2023-11-29 05:10:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:10:31,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585017265] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:31,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:31,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-11-29 05:10:31,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446041606] [2023-11-29 05:10:31,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:31,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:10:31,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:31,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:10:31,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:10:31,497 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 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 05:10:31,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:31,687 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2023-11-29 05:10:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:10:31,687 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 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 20 [2023-11-29 05:10:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:31,688 INFO L225 Difference]: With dead ends: 56 [2023-11-29 05:10:31,688 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 05:10:31,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:10:31,689 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:31,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 74 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:10:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 05:10:31,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 28. [2023-11-29 05:10:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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 05:10:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-11-29 05:10:31,699 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2023-11-29 05:10:31,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:31,699 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-11-29 05:10:31,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 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 05:10:31,700 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-11-29 05:10:31,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 05:10:31,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:31,701 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:31,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:10:31,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 05:10:31,901 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:31,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:31,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1632869082, now seen corresponding path program 4 times [2023-11-29 05:10:31,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:31,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797600708] [2023-11-29 05:10:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:31,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:10:31,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:31,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797600708] [2023-11-29 05:10:31,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797600708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:31,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804511129] [2023-11-29 05:10:31,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:10:31,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:31,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:31,992 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:31,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:10:32,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:10:32,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:32,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:10:32,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:10:32,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:10:32,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804511129] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:32,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:32,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-29 05:10:32,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443349508] [2023-11-29 05:10:32,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:32,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:10:32,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:32,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:10:32,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:10:32,364 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 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 05:10:32,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:32,546 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2023-11-29 05:10:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:10:32,547 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 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 05:10:32,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:32,547 INFO L225 Difference]: With dead ends: 49 [2023-11-29 05:10:32,548 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 05:10:32,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:10:32,549 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 80 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:32,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 50 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:10:32,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 05:10:32,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2023-11-29 05:10:32,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 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 05:10:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-11-29 05:10:32,558 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2023-11-29 05:10:32,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:32,558 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-11-29 05:10:32,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 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 05:10:32,558 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-11-29 05:10:32,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 05:10:32,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:32,559 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:32,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:10:32,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 05:10:32,760 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:32,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:32,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1972268471, now seen corresponding path program 5 times [2023-11-29 05:10:32,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:32,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386837692] [2023-11-29 05:10:32,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:32,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:10:33,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:33,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386837692] [2023-11-29 05:10:33,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386837692] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:33,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196470057] [2023-11-29 05:10:33,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:10:33,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:33,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:33,029 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:33,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:10:33,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 05:10:33,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:33,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:10:33,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:10:33,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:10:33,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196470057] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:33,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:33,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2023-11-29 05:10:33,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493572178] [2023-11-29 05:10:33,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:33,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 05:10:33,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:33,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 05:10:33,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:10:33,416 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 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 05:10:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:33,568 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2023-11-29 05:10:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:10:33,568 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 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 05:10:33,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:33,569 INFO L225 Difference]: With dead ends: 48 [2023-11-29 05:10:33,569 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 05:10:33,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:10:33,570 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:33,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 56 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:10:33,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 05:10:33,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2023-11-29 05:10:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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 05:10:33,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-11-29 05:10:33,586 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 22 [2023-11-29 05:10:33,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:33,586 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-11-29 05:10:33,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 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 05:10:33,587 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-11-29 05:10:33,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 05:10:33,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:33,588 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:33,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:10:33,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:10:33,793 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:33,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:33,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1751126151, now seen corresponding path program 6 times [2023-11-29 05:10:33,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:33,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791547632] [2023-11-29 05:10:33,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:33,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:34,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:34,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791547632] [2023-11-29 05:10:34,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791547632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:34,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027781334] [2023-11-29 05:10:34,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:10:34,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:34,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:34,590 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:34,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:10:34,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 05:10:34,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:34,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 05:10:34,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:34,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:10:34,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:10:34,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2023-11-29 05:10:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:35,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:35,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 104 [2023-11-29 05:10:35,306 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:10:35,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 316 [2023-11-29 05:10:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:35,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027781334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:35,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:35,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 41 [2023-11-29 05:10:35,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390062181] [2023-11-29 05:10:35,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:35,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 05:10:35,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:35,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 05:10:35,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 05:10:35,509 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 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 05:10:36,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:36,987 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2023-11-29 05:10:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 05:10:36,987 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 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 23 [2023-11-29 05:10:36,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:36,988 INFO L225 Difference]: With dead ends: 104 [2023-11-29 05:10:36,988 INFO L226 Difference]: Without dead ends: 92 [2023-11-29 05:10:36,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=772, Invalid=6034, Unknown=0, NotChecked=0, Total=6806 [2023-11-29 05:10:36,992 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 192 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:36,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 186 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:10:36,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-29 05:10:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 38. [2023-11-29 05:10:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 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 05:10:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-11-29 05:10:37,009 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 23 [2023-11-29 05:10:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:37,009 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-11-29 05:10:37,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 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 05:10:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-11-29 05:10:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 05:10:37,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:37,010 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:37,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:10:37,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:37,211 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:37,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:37,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1212242441, now seen corresponding path program 7 times [2023-11-29 05:10:37,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:37,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961316258] [2023-11-29 05:10:37,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:37,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:10:37,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:37,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961316258] [2023-11-29 05:10:37,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961316258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:37,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779760922] [2023-11-29 05:10:37,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:10:37,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:37,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:37,507 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:37,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:10:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:37,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:10:37,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:10:37,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:10:38,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779760922] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:38,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:38,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2023-11-29 05:10:38,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226285398] [2023-11-29 05:10:38,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:38,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 05:10:38,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:38,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 05:10:38,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2023-11-29 05:10:38,182 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 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 05:10:38,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:38,514 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2023-11-29 05:10:38,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:10:38,515 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 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 24 [2023-11-29 05:10:38,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:38,515 INFO L225 Difference]: With dead ends: 87 [2023-11-29 05:10:38,516 INFO L226 Difference]: Without dead ends: 76 [2023-11-29 05:10:38,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=340, Invalid=992, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 05:10:38,517 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 122 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:38,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 144 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:10:38,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-29 05:10:38,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 38. [2023-11-29 05:10:38,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:38,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-11-29 05:10:38,531 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 24 [2023-11-29 05:10:38,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:38,531 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-11-29 05:10:38,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 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 05:10:38,532 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-11-29 05:10:38,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 05:10:38,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:38,532 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:38,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:10:38,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:38,738 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:38,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:38,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1131622593, now seen corresponding path program 8 times [2023-11-29 05:10:38,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:38,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821154678] [2023-11-29 05:10:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:38,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:39,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:39,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821154678] [2023-11-29 05:10:39,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821154678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:39,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851079491] [2023-11-29 05:10:39,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:10:39,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:39,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:39,882 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:39,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:10:39,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:10:39,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:39,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 05:10:39,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:40,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:10:40,215 INFO L349 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2023-11-29 05:10:40,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2023-11-29 05:10:40,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-11-29 05:10:40,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:10:40,295 INFO L349 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2023-11-29 05:10:40,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 38 [2023-11-29 05:10:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:40,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:41,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 144 [2023-11-29 05:10:41,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:10:41,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14300 treesize of output 14164 [2023-11-29 05:10:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:41,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851079491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:41,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:41,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 47 [2023-11-29 05:10:41,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842476542] [2023-11-29 05:10:41,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:41,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 05:10:41,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:41,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 05:10:41,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1862, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 05:10:41,644 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 47 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:43,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:43,420 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2023-11-29 05:10:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 05:10:43,421 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 47 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-29 05:10:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:43,422 INFO L225 Difference]: With dead ends: 92 [2023-11-29 05:10:43,422 INFO L226 Difference]: Without dead ends: 90 [2023-11-29 05:10:43,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1136, Invalid=5836, Unknown=0, NotChecked=0, Total=6972 [2023-11-29 05:10:43,425 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 215 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:43,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 156 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:10:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-29 05:10:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 54. [2023-11-29 05:10:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 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 05:10:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2023-11-29 05:10:43,449 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 26 [2023-11-29 05:10:43,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:43,450 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2023-11-29 05:10:43,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 47 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:43,450 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2023-11-29 05:10:43,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 05:10:43,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:43,451 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:43,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 05:10:43,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 05:10:43,651 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:43,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:43,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1252306020, now seen corresponding path program 9 times [2023-11-29 05:10:43,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:43,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274858683] [2023-11-29 05:10:43,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:43,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:10:44,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:44,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274858683] [2023-11-29 05:10:44,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274858683] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:44,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551283237] [2023-11-29 05:10:44,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:10:44,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:44,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:44,096 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:44,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:10:44,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:10:44,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:44,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 05:10:44,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:10:44,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:10:44,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551283237] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:44,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:44,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2023-11-29 05:10:44,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339112106] [2023-11-29 05:10:44,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:44,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 05:10:44,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:44,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 05:10:44,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1138, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 05:10:44,967 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 39 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 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 05:10:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:45,473 INFO L93 Difference]: Finished difference Result 133 states and 148 transitions. [2023-11-29 05:10:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 05:10:45,474 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 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 05:10:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:45,476 INFO L225 Difference]: With dead ends: 133 [2023-11-29 05:10:45,476 INFO L226 Difference]: Without dead ends: 87 [2023-11-29 05:10:45,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=745, Invalid=2117, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 05:10:45,478 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 188 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:45,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 122 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:10:45,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-29 05:10:45,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 45. [2023-11-29 05:10:45,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 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 05:10:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2023-11-29 05:10:45,502 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 27 [2023-11-29 05:10:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:45,502 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2023-11-29 05:10:45,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 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 05:10:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2023-11-29 05:10:45,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 05:10:45,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:45,503 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:45,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:10:45,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:45,704 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:45,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:45,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1229618210, now seen corresponding path program 10 times [2023-11-29 05:10:45,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:45,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183936469] [2023-11-29 05:10:45,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:45,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:46,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:46,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183936469] [2023-11-29 05:10:46,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183936469] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:46,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488161122] [2023-11-29 05:10:46,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:10:46,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:46,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:46,819 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:46,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:10:46,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:10:46,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:46,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 05:10:46,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:47,044 INFO L349 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2023-11-29 05:10:47,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 21 [2023-11-29 05:10:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:10:47,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:47,697 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 05:10:47,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 33 [2023-11-29 05:10:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:10:47,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488161122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:47,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:47,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 43 [2023-11-29 05:10:47,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568613235] [2023-11-29 05:10:47,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:47,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 05:10:47,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:47,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 05:10:47,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 05:10:47,928 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 43 states have internal predecessors, (69), 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 05:10:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:50,692 INFO L93 Difference]: Finished difference Result 148 states and 164 transitions. [2023-11-29 05:10:50,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-29 05:10:50,693 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 43 states have internal predecessors, (69), 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 05:10:50,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:50,694 INFO L225 Difference]: With dead ends: 148 [2023-11-29 05:10:50,694 INFO L226 Difference]: Without dead ends: 128 [2023-11-29 05:10:50,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1384, Invalid=7928, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 05:10:50,698 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 344 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:50,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 290 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:10:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-29 05:10:50,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 91. [2023-11-29 05:10:50,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 90 states have internal predecessors, (103), 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 05:10:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2023-11-29 05:10:50,743 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 29 [2023-11-29 05:10:50,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:50,743 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2023-11-29 05:10:50,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 43 states have internal predecessors, (69), 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 05:10:50,744 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2023-11-29 05:10:50,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 05:10:50,744 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:50,744 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:50,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:10:50,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:50,945 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:50,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:50,945 INFO L85 PathProgramCache]: Analyzing trace with hash -845650842, now seen corresponding path program 11 times [2023-11-29 05:10:50,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:50,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443168451] [2023-11-29 05:10:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:50,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 3 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:53,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:53,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443168451] [2023-11-29 05:10:53,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443168451] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:53,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701806711] [2023-11-29 05:10:53,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:10:53,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:53,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:53,046 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:53,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:10:53,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 05:10:53,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:53,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 05:10:53,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:54,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:10:54,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-11-29 05:10:54,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:10:54,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:10:54,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 15 [2023-11-29 05:10:54,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:10:54,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:10:54,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 15 [2023-11-29 05:10:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:54,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:55,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 77 [2023-11-29 05:10:55,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5655958 treesize of output 5639574 [2023-11-29 05:10:55,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 215 [2023-11-29 05:10:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:55,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701806711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:55,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:55,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 68 [2023-11-29 05:10:55,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452400055] [2023-11-29 05:10:55,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:55,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-11-29 05:10:55,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:55,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-11-29 05:10:55,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=4060, Unknown=0, NotChecked=0, Total=4556 [2023-11-29 05:10:55,838 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 68 states, 68 states have (on average 1.338235294117647) internal successors, (91), 68 states have internal predecessors, (91), 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 05:11:06,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:11:06,917 INFO L93 Difference]: Finished difference Result 352 states and 381 transitions. [2023-11-29 05:11:06,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2023-11-29 05:11:06,917 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.338235294117647) internal successors, (91), 68 states have internal predecessors, (91), 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 05:11:06,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:11:06,919 INFO L225 Difference]: With dead ends: 352 [2023-11-29 05:11:06,919 INFO L226 Difference]: Without dead ends: 315 [2023-11-29 05:11:06,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17180 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=5458, Invalid=49064, Unknown=0, NotChecked=0, Total=54522 [2023-11-29 05:11:06,927 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 1430 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 3271 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1430 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 3664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 3271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:11:06,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1430 Valid, 1439 Invalid, 3664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 3271 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 05:11:06,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-11-29 05:11:06,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 101. [2023-11-29 05:11:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.12) internal successors, (112), 100 states have internal predecessors, (112), 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 05:11:06,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2023-11-29 05:11:06,972 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 32 [2023-11-29 05:11:06,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:11:06,972 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2023-11-29 05:11:06,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.338235294117647) internal successors, (91), 68 states have internal predecessors, (91), 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 05:11:06,972 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2023-11-29 05:11:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 05:11:06,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:11:06,973 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:11:06,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:11:07,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:11:07,174 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:11:07,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:11:07,174 INFO L85 PathProgramCache]: Analyzing trace with hash -214738106, now seen corresponding path program 12 times [2023-11-29 05:11:07,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:11:07,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955062929] [2023-11-29 05:11:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:11:07,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:11:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:11:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:11:08,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:11:08,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955062929] [2023-11-29 05:11:08,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955062929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:11:08,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288490104] [2023-11-29 05:11:08,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:11:08,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:11:08,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:11:08,648 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:11:08,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:11:08,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 05:11:08,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:11:08,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-29 05:11:08,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:11:08,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:11:09,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:11:09,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2023-11-29 05:11:09,237 INFO L349 Elim1Store]: treesize reduction 52, result has 20.0 percent of original size [2023-11-29 05:11:09,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 21 [2023-11-29 05:11:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:11:09,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:11:10,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2023-11-29 05:11:10,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3022 treesize of output 2990 [2023-11-29 05:11:10,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2023-11-29 05:11:10,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24810 treesize of output 24554 [2023-11-29 05:11:10,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2023-11-29 05:11:10,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12842 treesize of output 12714 [2023-11-29 05:11:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:11:11,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288490104] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:11:11,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:11:11,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 23] total 61 [2023-11-29 05:11:11,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694737619] [2023-11-29 05:11:11,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:11:11,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-29 05:11:11,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:11:11,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-29 05:11:11,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=3321, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 05:11:11,143 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 61 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 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 05:11:15,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:11:15,729 INFO L93 Difference]: Finished difference Result 217 states and 234 transitions. [2023-11-29 05:11:15,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-29 05:11:15,729 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 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 05:11:15,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:11:15,731 INFO L225 Difference]: With dead ends: 217 [2023-11-29 05:11:15,731 INFO L226 Difference]: Without dead ends: 215 [2023-11-29 05:11:15,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3897 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2532, Invalid=14498, Unknown=0, NotChecked=0, Total=17030 [2023-11-29 05:11:15,733 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 432 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:11:15,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 385 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 05:11:15,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-29 05:11:15,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 150. [2023-11-29 05:11:15,820 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 05:11:15,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 164 transitions. [2023-11-29 05:11:15,820 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 164 transitions. Word has length 32 [2023-11-29 05:11:15,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:11:15,820 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 164 transitions. [2023-11-29 05:11:15,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 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 05:11:15,821 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 164 transitions. [2023-11-29 05:11:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 05:11:15,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:11:15,821 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:11:15,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:11:16,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:11:16,022 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:11:16,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:11:16,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1824289542, now seen corresponding path program 13 times [2023-11-29 05:11:16,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:11:16,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737034802] [2023-11-29 05:11:16,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:11:16,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:11:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:11:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 05:11:16,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:11:16,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737034802] [2023-11-29 05:11:16,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737034802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:11:16,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622270467] [2023-11-29 05:11:16,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:11:16,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:11:16,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:11:16,421 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:11:16,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:11:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:11:16,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:11:16,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:11:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 05:11:16,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:11:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 05:11:17,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622270467] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:11:17,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:11:17,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2023-11-29 05:11:17,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357081537] [2023-11-29 05:11:17,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:11:17,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 05:11:17,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:11:17,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 05:11:17,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1350, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 05:11:17,246 INFO L87 Difference]: Start difference. First operand 150 states and 164 transitions. Second operand has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 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 05:11:17,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:11:17,753 INFO L93 Difference]: Finished difference Result 212 states and 229 transitions. [2023-11-29 05:11:17,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:11:17,754 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 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 05:11:17,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:11:17,755 INFO L225 Difference]: With dead ends: 212 [2023-11-29 05:11:17,755 INFO L226 Difference]: Without dead ends: 168 [2023-11-29 05:11:17,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=2029, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 05:11:17,756 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 180 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:11:17,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 220 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:11:17,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-29 05:11:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 117. [2023-11-29 05:11:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 116 states have internal predecessors, (127), 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 05:11:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2023-11-29 05:11:17,824 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 34 [2023-11-29 05:11:17,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:11:17,824 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2023-11-29 05:11:17,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 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 05:11:17,824 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2023-11-29 05:11:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 05:11:17,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:11:17,825 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:11:17,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:11:18,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:11:18,025 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:11:18,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:11:18,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1499159682, now seen corresponding path program 14 times [2023-11-29 05:11:18,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:11:18,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323152117] [2023-11-29 05:11:18,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:11:18,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:11:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:11:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:11:18,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:11:18,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323152117] [2023-11-29 05:11:18,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323152117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:11:18,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203516460] [2023-11-29 05:11:18,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:11:18,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:11:18,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:11:18,754 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:11:18,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:11:18,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:11:18,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:11:18,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 05:11:18,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:11:19,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:11:19,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-11-29 05:11:19,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:11:19,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 15 [2023-11-29 05:11:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:11:19,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:11:19,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2023-11-29 05:11:19,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5814 treesize of output 5750 [2023-11-29 05:11:19,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 94 [2023-11-29 05:11:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:11:20,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203516460] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:11:20,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:11:20,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 25] total 64 [2023-11-29 05:11:20,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847533413] [2023-11-29 05:11:20,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:11:20,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-29 05:11:20,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:11:20,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-29 05:11:20,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=3335, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 05:11:20,129 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand has 64 states, 64 states have (on average 1.375) internal successors, (88), 64 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 05:11:23,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:11:23,532 INFO L93 Difference]: Finished difference Result 260 states and 277 transitions. [2023-11-29 05:11:23,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-11-29 05:11:23,532 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.375) internal successors, (88), 64 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) Word has length 35 [2023-11-29 05:11:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:11:23,533 INFO L225 Difference]: With dead ends: 260 [2023-11-29 05:11:23,534 INFO L226 Difference]: Without dead ends: 258 [2023-11-29 05:11:23,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5871 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3082, Invalid=16658, Unknown=0, NotChecked=0, Total=19740 [2023-11-29 05:11:23,535 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 262 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 2917 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 3015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:11:23,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 1529 Invalid, 3015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2917 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 05:11:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-11-29 05:11:23,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 99. [2023-11-29 05:11:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 98 states have internal predecessors, (108), 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 05:11:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2023-11-29 05:11:23,583 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 35 [2023-11-29 05:11:23,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:11:23,584 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2023-11-29 05:11:23,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.375) internal successors, (88), 64 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 05:11:23,584 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2023-11-29 05:11:23,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 05:11:23,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:11:23,584 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:11:23,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:11:23,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:11:23,785 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:11:23,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:11:23,785 INFO L85 PathProgramCache]: Analyzing trace with hash 787605159, now seen corresponding path program 15 times [2023-11-29 05:11:23,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:11:23,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032896930] [2023-11-29 05:11:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:11:23,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:11:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:11:25,086 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 05:11:25,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:11:25,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032896930] [2023-11-29 05:11:25,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032896930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:11:25,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347495343] [2023-11-29 05:11:25,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:11:25,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:11:25,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:11:25,088 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:11:25,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:11:25,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 05:11:25,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:11:25,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 05:11:25,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:11:25,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:11:25,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2023-11-29 05:11:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 05:11:25,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:11:26,160 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 05:11:26,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 33 [2023-11-29 05:11:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 05:11:26,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347495343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:11:26,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:11:26,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16, 15] total 47 [2023-11-29 05:11:26,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938213439] [2023-11-29 05:11:26,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:11:26,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 05:11:26,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:11:26,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 05:11:26,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 05:11:26,588 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 47 states have internal predecessors, (83), 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 05:11:31,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:11:31,102 INFO L93 Difference]: Finished difference Result 236 states and 251 transitions. [2023-11-29 05:11:31,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-29 05:11:31,103 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 47 states have internal predecessors, (83), 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 05:11:31,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:11:31,104 INFO L225 Difference]: With dead ends: 236 [2023-11-29 05:11:31,104 INFO L226 Difference]: Without dead ends: 234 [2023-11-29 05:11:31,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5111 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1977, Invalid=16113, Unknown=0, NotChecked=0, Total=18090 [2023-11-29 05:11:31,106 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 482 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:11:31,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 602 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 05:11:31,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-29 05:11:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 80. [2023-11-29 05:11:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 79 states have internal predecessors, (87), 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 05:11:31,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2023-11-29 05:11:31,151 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 35 [2023-11-29 05:11:31,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:11:31,151 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2023-11-29 05:11:31,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 47 states have internal predecessors, (83), 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 05:11:31,151 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2023-11-29 05:11:31,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 05:11:31,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:11:31,152 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:11:31,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:11:31,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:11:31,352 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:11:31,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:11:31,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2051376734, now seen corresponding path program 16 times [2023-11-29 05:11:31,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:11:31,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707729269] [2023-11-29 05:11:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:11:31,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:11:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:11:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:11:32,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:11:32,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707729269] [2023-11-29 05:11:32,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707729269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:11:32,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292569526] [2023-11-29 05:11:32,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:11:32,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:11:32,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:11:32,325 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:11:32,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:11:32,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:11:32,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:11:32,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 05:11:32,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:11:32,495 INFO L349 Elim1Store]: treesize reduction 41, result has 37.9 percent of original size [2023-11-29 05:11:32,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 25 [2023-11-29 05:11:32,546 INFO L349 Elim1Store]: treesize reduction 66, result has 25.8 percent of original size [2023-11-29 05:11:32,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 39 [2023-11-29 05:11:32,555 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 05:11:32,602 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 05:11:32,617 INFO L349 Elim1Store]: treesize reduction 73, result has 17.0 percent of original size [2023-11-29 05:11:32,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 39 [2023-11-29 05:11:37,566 INFO L349 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2023-11-29 05:11:37,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2023-11-29 05:11:37,575 INFO L349 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2023-11-29 05:11:37,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 20 [2023-11-29 05:11:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:11:37,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:11:38,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:11:38,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 76 [2023-11-29 05:11:38,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 63 [2023-11-29 05:11:38,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28742 treesize of output 28614 [2023-11-29 05:11:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:11:38,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292569526] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:11:38,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:11:38,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 48 [2023-11-29 05:11:38,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063674012] [2023-11-29 05:11:38,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:11:38,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-29 05:11:38,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:11:38,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-29 05:11:38,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2010, Unknown=1, NotChecked=0, Total=2256 [2023-11-29 05:11:38,664 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 48 states, 48 states have (on average 1.8125) internal successors, (87), 48 states have internal predecessors, (87), 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 05:11:43,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:11:44,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:11:44,519 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2023-11-29 05:11:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 05:11:44,520 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8125) internal successors, (87), 48 states have internal predecessors, (87), 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 05:11:44,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:11:44,520 INFO L225 Difference]: With dead ends: 86 [2023-11-29 05:11:44,520 INFO L226 Difference]: Without dead ends: 59 [2023-11-29 05:11:44,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=804, Invalid=4451, Unknown=1, NotChecked=0, Total=5256 [2023-11-29 05:11:44,522 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 144 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 70 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:11:44,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 126 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 689 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2023-11-29 05:11:44,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-29 05:11:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2023-11-29 05:11:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 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 05:11:44,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2023-11-29 05:11:44,558 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 35 [2023-11-29 05:11:44,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:11:44,558 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2023-11-29 05:11:44,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.8125) internal successors, (87), 48 states have internal predecessors, (87), 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 05:11:44,558 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2023-11-29 05:11:44,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 05:11:44,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:11:44,558 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:11:44,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 05:11:44,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:11:44,759 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:11:44,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:11:44,759 INFO L85 PathProgramCache]: Analyzing trace with hash -742479713, now seen corresponding path program 17 times [2023-11-29 05:11:44,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:11:44,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717224538] [2023-11-29 05:11:44,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:11:44,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:11:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:11:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 05:11:45,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:11:45,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717224538] [2023-11-29 05:11:45,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717224538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:11:45,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477274470] [2023-11-29 05:11:45,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:11:45,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:11:45,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:11:45,120 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:11:45,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:11:45,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 05:11:45,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:11:45,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:11:45,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:11:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 05:11:45,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:11:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 05:11:46,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477274470] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:11:46,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:11:46,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 42 [2023-11-29 05:11:46,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253604624] [2023-11-29 05:11:46,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:11:46,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 05:11:46,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:11:46,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 05:11:46,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1349, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 05:11:46,016 INFO L87 Difference]: Start difference. First operand 55 states and 61 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 05:11:46,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:11:46,326 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2023-11-29 05:11:46,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 05:11:46,327 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 37 [2023-11-29 05:11:46,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:11:46,327 INFO L225 Difference]: With dead ends: 99 [2023-11-29 05:11:46,327 INFO L226 Difference]: Without dead ends: 71 [2023-11-29 05:11:46,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=567, Invalid=1785, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 05:11:46,329 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 59 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:11:46,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 67 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:11:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-29 05:11:46,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2023-11-29 05:11:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 54 states have internal predecessors, (60), 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 05:11:46,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2023-11-29 05:11:46,379 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 37 [2023-11-29 05:11:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:11:46,379 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2023-11-29 05:11:46,380 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 05:11:46,380 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2023-11-29 05:11:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 05:11:46,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:11:46,380 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:11:46,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 05:11:46,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 05:11:46,581 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:11:46,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:11:46,581 INFO L85 PathProgramCache]: Analyzing trace with hash 144189089, now seen corresponding path program 18 times [2023-11-29 05:11:46,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:11:46,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208831757] [2023-11-29 05:11:46,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:11:46,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:11:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:11:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 1 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:11:48,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:11:48,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208831757] [2023-11-29 05:11:48,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208831757] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:11:48,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180885470] [2023-11-29 05:11:48,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:11:48,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:11:48,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:11:48,394 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:11:48,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:11:48,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-29 05:11:48,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:11:48,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 05:11:48,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:11:49,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:11:49,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2023-11-29 05:11:49,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:11:49,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:11:49,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 23 [2023-11-29 05:11:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:11:49,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:11:50,444 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 05:11:50,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2023-11-29 05:11:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 05:11:50,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180885470] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:11:50,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:11:50,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 17] total 60 [2023-11-29 05:11:50,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682455251] [2023-11-29 05:11:50,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:11:50,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 05:11:50,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:11:50,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 05:11:50,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=3242, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 05:11:50,825 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 60 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 05:11:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:11:56,775 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2023-11-29 05:11:56,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-11-29 05:11:56,776 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 60 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) Word has length 38 [2023-11-29 05:11:56,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:11:56,776 INFO L225 Difference]: With dead ends: 136 [2023-11-29 05:11:56,776 INFO L226 Difference]: Without dead ends: 134 [2023-11-29 05:11:56,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4699 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2764, Invalid=15326, Unknown=0, NotChecked=0, Total=18090 [2023-11-29 05:11:56,778 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 688 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:11:56,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 204 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:11:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-29 05:11:56,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 58. [2023-11-29 05:11:56,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.105263157894737) internal successors, (63), 57 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:11:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2023-11-29 05:11:56,819 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 38 [2023-11-29 05:11:56,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:11:56,819 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2023-11-29 05:11:56,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 60 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 05:11:56,819 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2023-11-29 05:11:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 05:11:56,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:11:56,820 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:11:56,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 05:11:57,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 05:11:57,020 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:11:57,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:11:57,020 INFO L85 PathProgramCache]: Analyzing trace with hash 575089767, now seen corresponding path program 19 times [2023-11-29 05:11:57,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:11:57,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334368944] [2023-11-29 05:11:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:11:57,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:11:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:11:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:11:58,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:11:58,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334368944] [2023-11-29 05:11:58,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334368944] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:11:58,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581166733] [2023-11-29 05:11:58,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:11:58,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:11:58,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:11:58,655 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:11:58,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 05:11:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:11:58,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-29 05:11:58,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:11:59,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:11:59,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 23 [2023-11-29 05:11:59,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2023-11-29 05:11:59,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2023-11-29 05:11:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:11:59,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:12:00,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:12:00,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 76 [2023-11-29 05:12:00,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 63 [2023-11-29 05:12:00,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3471122 treesize of output 3454738 [2023-11-29 05:12:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:12:01,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581166733] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:12:01,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:12:01,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 27] total 71 [2023-11-29 05:12:01,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077267569] [2023-11-29 05:12:01,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:12:01,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-29 05:12:01,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:12:01,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-29 05:12:01,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=4480, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 05:12:01,489 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 71 states, 71 states have (on average 1.6338028169014085) internal successors, (116), 71 states have internal predecessors, (116), 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 05:12:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:12:07,557 INFO L93 Difference]: Finished difference Result 175 states and 193 transitions. [2023-11-29 05:12:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-29 05:12:07,558 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.6338028169014085) internal successors, (116), 71 states have internal predecessors, (116), 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 05:12:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:12:07,559 INFO L225 Difference]: With dead ends: 175 [2023-11-29 05:12:07,559 INFO L226 Difference]: Without dead ends: 173 [2023-11-29 05:12:07,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6840 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4086, Invalid=21354, Unknown=0, NotChecked=0, Total=25440 [2023-11-29 05:12:07,561 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 600 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:12:07,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 409 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 05:12:07,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-29 05:12:07,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 81. [2023-11-29 05:12:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.15) internal successors, (92), 80 states have internal predecessors, (92), 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 05:12:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2023-11-29 05:12:07,626 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 41 [2023-11-29 05:12:07,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:12:07,626 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2023-11-29 05:12:07,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.6338028169014085) internal successors, (116), 71 states have internal predecessors, (116), 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 05:12:07,626 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2023-11-29 05:12:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 05:12:07,626 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:12:07,627 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:12:07,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-29 05:12:07,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 05:12:07,827 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:12:07,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:12:07,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1440102, now seen corresponding path program 20 times [2023-11-29 05:12:07,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:12:07,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814277109] [2023-11-29 05:12:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:12:07,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:12:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:12:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:12:09,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:12:09,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814277109] [2023-11-29 05:12:09,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814277109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:12:09,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153151923] [2023-11-29 05:12:09,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:12:09,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:12:09,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:12:09,777 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:12:09,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 05:12:09,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:12:09,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:12:09,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 86 conjunts are in the unsatisfiable core [2023-11-29 05:12:09,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:12:10,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:12:10,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:12:10,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:12:10,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:12:10,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2023-11-29 05:12:10,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2023-11-29 05:12:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:12:11,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:12:12,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 144 [2023-11-29 05:12:12,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:12:12,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2472 treesize of output 2448 [2023-11-29 05:12:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:12:13,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153151923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:12:13,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:12:13,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 30] total 79 [2023-11-29 05:12:13,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466172490] [2023-11-29 05:12:13,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:12:13,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-29 05:12:13,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:12:13,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-29 05:12:13,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=5833, Unknown=0, NotChecked=0, Total=6162 [2023-11-29 05:12:13,073 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 79 states, 79 states have (on average 1.5569620253164558) internal successors, (123), 79 states have internal predecessors, (123), 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 05:12:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:12:23,939 INFO L93 Difference]: Finished difference Result 372 states and 401 transitions. [2023-11-29 05:12:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2023-11-29 05:12:23,940 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.5569620253164558) internal successors, (123), 79 states have internal predecessors, (123), 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 05:12:23,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:12:23,941 INFO L225 Difference]: With dead ends: 372 [2023-11-29 05:12:23,941 INFO L226 Difference]: Without dead ends: 337 [2023-11-29 05:12:23,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13752 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2529, Invalid=44777, Unknown=0, NotChecked=0, Total=47306 [2023-11-29 05:12:23,946 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 569 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 4377 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 4626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 4377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:12:23,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 1710 Invalid, 4626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 4377 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 05:12:23,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-11-29 05:12:24,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 83. [2023-11-29 05:12:24,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 82 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 05:12:24,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2023-11-29 05:12:24,048 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 44 [2023-11-29 05:12:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:12:24,048 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2023-11-29 05:12:24,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.5569620253164558) internal successors, (123), 79 states have internal predecessors, (123), 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 05:12:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2023-11-29 05:12:24,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 05:12:24,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:12:24,049 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:12:24,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 05:12:24,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 05:12:24,249 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:12:24,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:12:24,250 INFO L85 PathProgramCache]: Analyzing trace with hash -120059679, now seen corresponding path program 21 times [2023-11-29 05:12:24,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:12:24,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867443024] [2023-11-29 05:12:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:12:24,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:12:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:12:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:12:26,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:12:26,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867443024] [2023-11-29 05:12:26,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867443024] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:12:26,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408570169] [2023-11-29 05:12:26,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:12:26,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:12:26,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:12:26,246 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:12:26,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 05:12:26,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-29 05:12:26,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:12:26,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-29 05:12:26,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:12:26,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 05:12:27,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:12:27,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2023-11-29 05:12:27,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 05:12:27,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:12:27,217 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-11-29 05:12:27,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 27 [2023-11-29 05:12:27,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:12:27,313 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-11-29 05:12:27,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 31 [2023-11-29 05:12:27,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 05:12:27,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:12:27,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:12:27,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 30 [2023-11-29 05:12:27,431 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 05:12:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:12:28,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:12:29,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 100 [2023-11-29 05:12:32,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12102715622682 treesize of output 12094125688090 [2023-11-29 05:14:06,351 WARN L293 SmtUtils]: Spent 1.55m on a formula simplification. DAG size of input: 167245 DAG size of output: 162 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 05:14:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:14:07,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408570169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:14:07,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:14:07,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 76 [2023-11-29 05:14:07,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007061756] [2023-11-29 05:14:07,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:14:07,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-29 05:14:07,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:07,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-29 05:14:07,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=4912, Unknown=0, NotChecked=0, Total=5700 [2023-11-29 05:14:07,317 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 76 states, 76 states have (on average 1.6710526315789473) internal successors, (127), 76 states have internal predecessors, (127), 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 05:14:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:11,581 INFO L93 Difference]: Finished difference Result 151 states and 170 transitions. [2023-11-29 05:14:11,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-29 05:14:11,582 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.6710526315789473) internal successors, (127), 76 states have internal predecessors, (127), 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 05:14:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:11,582 INFO L225 Difference]: With dead ends: 151 [2023-11-29 05:14:11,582 INFO L226 Difference]: Without dead ends: 109 [2023-11-29 05:14:11,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4026 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2573, Invalid=12433, Unknown=0, NotChecked=0, Total=15006 [2023-11-29 05:14:11,584 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 218 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:11,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 233 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 05:14:11,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-29 05:14:11,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 80. [2023-11-29 05:14:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 79 states have internal predecessors, (96), 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 05:14:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2023-11-29 05:14:11,664 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 44 [2023-11-29 05:14:11,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:11,664 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2023-11-29 05:14:11,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.6710526315789473) internal successors, (127), 76 states have internal predecessors, (127), 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 05:14:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2023-11-29 05:14:11,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 05:14:11,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:11,664 INFO L195 NwaCegarLoop]: trace histogram [12, 7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:14:11,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 05:14:11,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 05:14:11,865 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:11,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:11,865 INFO L85 PathProgramCache]: Analyzing trace with hash 469332262, now seen corresponding path program 22 times [2023-11-29 05:14:11,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:11,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411591132] [2023-11-29 05:14:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:11,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 55 proven. 38 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-29 05:14:12,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:14:12,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411591132] [2023-11-29 05:14:12,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411591132] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:14:12,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990608773] [2023-11-29 05:14:12,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:14:12,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:12,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:12,506 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:12,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 05:14:12,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:14:12,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:14:12,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 05:14:12,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:14:12,762 INFO L349 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2023-11-29 05:14:12,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 21 [2023-11-29 05:14:12,816 INFO L349 Elim1Store]: treesize reduction 51, result has 19.0 percent of original size [2023-11-29 05:14:12,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 25 [2023-11-29 05:14:12,821 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 05:14:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 05:14:13,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:14:13,833 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 05:14:13,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 55 [2023-11-29 05:14:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 05:14:14,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990608773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:14:14,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:14:14,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 56 [2023-11-29 05:14:14,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018791084] [2023-11-29 05:14:14,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:14:14,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 05:14:14,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:14,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 05:14:14,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=2664, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 05:14:14,125 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 56 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 56 states have internal predecessors, (93), 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 05:14:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:20,184 INFO L93 Difference]: Finished difference Result 275 states and 298 transitions. [2023-11-29 05:14:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-11-29 05:14:20,185 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 56 states have internal predecessors, (93), 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 46 [2023-11-29 05:14:20,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:20,186 INFO L225 Difference]: With dead ends: 275 [2023-11-29 05:14:20,187 INFO L226 Difference]: Without dead ends: 237 [2023-11-29 05:14:20,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5231 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2293, Invalid=16613, Unknown=0, NotChecked=0, Total=18906 [2023-11-29 05:14:20,190 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 510 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 2195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:20,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 768 Invalid, 2195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 05:14:20,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-29 05:14:20,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 111. [2023-11-29 05:14:20,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 110 states have internal predecessors, (127), 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 05:14:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2023-11-29 05:14:20,341 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 46 [2023-11-29 05:14:20,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:20,341 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2023-11-29 05:14:20,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 56 states have internal predecessors, (93), 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 05:14:20,341 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2023-11-29 05:14:20,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 05:14:20,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:20,342 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:14:20,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-29 05:14:20,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 05:14:20,542 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:20,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:20,542 INFO L85 PathProgramCache]: Analyzing trace with hash -42358910, now seen corresponding path program 23 times [2023-11-29 05:14:20,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:20,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978775561] [2023-11-29 05:14:20,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:20,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 3 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:14:23,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:14:23,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978775561] [2023-11-29 05:14:23,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978775561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:14:23,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441099359] [2023-11-29 05:14:23,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:14:23,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:23,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:23,202 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:23,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 05:14:24,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 05:14:24,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:14:24,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-29 05:14:24,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:14:25,000 INFO L349 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2023-11-29 05:14:25,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2023-11-29 05:14:25,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 05:14:25,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:14:25,091 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-11-29 05:14:25,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 31 [2023-11-29 05:14:25,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:14:25,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:14:25,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 30 [2023-11-29 05:14:26,386 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:14:26,388 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:14:26,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 42 [2023-11-29 05:14:26,392 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:14:26,394 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:14:26,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 20 [2023-11-29 05:14:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:14:26,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:14:27,265 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 05:14:27,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 71 [2023-11-29 05:14:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:14:28,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441099359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:14:28,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:14:28,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 85 [2023-11-29 05:14:28,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248307445] [2023-11-29 05:14:28,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:14:28,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-11-29 05:14:28,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:28,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-11-29 05:14:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=6428, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 05:14:28,324 INFO L87 Difference]: Start difference. First operand 111 states and 127 transitions. Second operand has 85 states, 85 states have (on average 1.6) internal successors, (136), 85 states have internal predecessors, (136), 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 05:14:33,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:33,266 INFO L93 Difference]: Finished difference Result 156 states and 169 transitions. [2023-11-29 05:14:33,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-29 05:14:33,266 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.6) internal successors, (136), 85 states have internal predecessors, (136), 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 47 [2023-11-29 05:14:33,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:33,267 INFO L225 Difference]: With dead ends: 156 [2023-11-29 05:14:33,268 INFO L226 Difference]: Without dead ends: 154 [2023-11-29 05:14:33,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5041 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2571, Invalid=16611, Unknown=0, NotChecked=0, Total=19182 [2023-11-29 05:14:33,269 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 441 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:33,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 356 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:14:33,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-29 05:14:33,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 111. [2023-11-29 05:14:33,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1454545454545455) internal successors, (126), 110 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:14:33,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2023-11-29 05:14:33,402 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 47 [2023-11-29 05:14:33,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:33,402 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2023-11-29 05:14:33,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.6) internal successors, (136), 85 states have internal predecessors, (136), 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 05:14:33,402 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2023-11-29 05:14:33,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 05:14:33,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:33,403 INFO L195 NwaCegarLoop]: trace histogram [12, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:14:33,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 05:14:33,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 05:14:33,603 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:33,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:33,604 INFO L85 PathProgramCache]: Analyzing trace with hash 912389249, now seen corresponding path program 24 times [2023-11-29 05:14:33,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:33,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281628298] [2023-11-29 05:14:33,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:33,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:14:35,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:14:35,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281628298] [2023-11-29 05:14:35,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281628298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:14:35,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655859256] [2023-11-29 05:14:35,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:14:35,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:35,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:35,767 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:35,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 05:14:37,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 05:14:37,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:14:37,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 05:14:37,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:14:37,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:14:37,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2023-11-29 05:14:37,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:14:37,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:14:37,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 23 [2023-11-29 05:14:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 05:14:38,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:14:39,362 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 05:14:39,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2023-11-29 05:14:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 05:14:40,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655859256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:14:40,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:14:40,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 22, 21] total 71 [2023-11-29 05:14:40,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098139206] [2023-11-29 05:14:40,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:14:40,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-29 05:14:40,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:40,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-29 05:14:40,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=4643, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 05:14:40,087 INFO L87 Difference]: Start difference. First operand 111 states and 126 transitions. Second operand has 71 states, 71 states have (on average 1.732394366197183) internal successors, (123), 71 states have internal predecessors, (123), 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 05:14:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:55,399 INFO L93 Difference]: Finished difference Result 326 states and 356 transitions. [2023-11-29 05:14:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2023-11-29 05:14:55,399 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.732394366197183) internal successors, (123), 71 states have internal predecessors, (123), 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 50 [2023-11-29 05:14:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:55,401 INFO L225 Difference]: With dead ends: 326 [2023-11-29 05:14:55,401 INFO L226 Difference]: Without dead ends: 293 [2023-11-29 05:14:55,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16092 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=4840, Invalid=50150, Unknown=0, NotChecked=0, Total=54990 [2023-11-29 05:14:55,405 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 980 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 3858 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 4250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 3858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:55,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 1364 Invalid, 4250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 3858 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 05:14:55,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-11-29 05:14:55,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 144. [2023-11-29 05:14:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.118881118881119) internal successors, (160), 143 states have internal predecessors, (160), 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 05:14:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 160 transitions. [2023-11-29 05:14:55,581 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 160 transitions. Word has length 50 [2023-11-29 05:14:55,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:55,581 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 160 transitions. [2023-11-29 05:14:55,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.732394366197183) internal successors, (123), 71 states have internal predecessors, (123), 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 05:14:55,582 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 160 transitions. [2023-11-29 05:14:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 05:14:55,582 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:55,582 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:14:55,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 05:14:55,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 05:14:55,783 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:55,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:55,783 INFO L85 PathProgramCache]: Analyzing trace with hash 811332582, now seen corresponding path program 25 times [2023-11-29 05:14:55,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:55,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573542205] [2023-11-29 05:14:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:55,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 1 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:14:58,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:14:58,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573542205] [2023-11-29 05:14:58,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573542205] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:14:58,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900040658] [2023-11-29 05:14:58,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:14:58,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:58,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:58,118 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:58,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 05:14:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:58,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 83 conjunts are in the unsatisfiable core [2023-11-29 05:14:58,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:14:58,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:14:58,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 23 [2023-11-29 05:14:58,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2023-11-29 05:14:58,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2023-11-29 05:14:59,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2023-11-29 05:14:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:14:59,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:15:00,748 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:15:00,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 95 [2023-11-29 05:15:00,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 82 [2023-11-29 05:15:00,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14323442 treesize of output 14307058 [2023-11-29 05:15:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:03,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900040658] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:15:03,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:15:03,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 32] total 86 [2023-11-29 05:15:03,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908250014] [2023-11-29 05:15:03,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:15:03,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-11-29 05:15:03,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:03,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-11-29 05:15:03,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=6657, Unknown=0, NotChecked=0, Total=7310 [2023-11-29 05:15:03,016 INFO L87 Difference]: Start difference. First operand 144 states and 160 transitions. Second operand has 86 states, 86 states have (on average 1.6627906976744187) internal successors, (143), 86 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:11,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:15:11,029 INFO L93 Difference]: Finished difference Result 250 states and 279 transitions. [2023-11-29 05:15:11,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-11-29 05:15:11,029 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.6627906976744187) internal successors, (143), 86 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-29 05:15:11,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:15:11,031 INFO L225 Difference]: With dead ends: 250 [2023-11-29 05:15:11,031 INFO L226 Difference]: Without dead ends: 248 [2023-11-29 05:15:11,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9241 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=4981, Invalid=28691, Unknown=0, NotChecked=0, Total=33672 [2023-11-29 05:15:11,036 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 623 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 2508 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 2508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:15:11,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 665 Invalid, 2838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 2508 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 05:15:11,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-29 05:15:11,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 189. [2023-11-29 05:15:11,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.148936170212766) internal successors, (216), 188 states have internal predecessors, (216), 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 05:15:11,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 216 transitions. [2023-11-29 05:15:11,302 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 216 transitions. Word has length 50 [2023-11-29 05:15:11,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:15:11,302 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 216 transitions. [2023-11-29 05:15:11,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.6627906976744187) internal successors, (143), 86 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:15:11,303 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 216 transitions. [2023-11-29 05:15:11,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 05:15:11,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:15:11,303 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:11,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 05:15:11,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:15:11,504 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:15:11,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:11,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1854664057, now seen corresponding path program 26 times [2023-11-29 05:15:11,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:11,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061996933] [2023-11-29 05:15:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:11,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:13,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:13,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061996933] [2023-11-29 05:15:13,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061996933] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:15:13,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334916829] [2023-11-29 05:15:13,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:15:13,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:15:13,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:15:13,942 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:15:13,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 05:15:14,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:15:14,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:15:14,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-29 05:15:14,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:15:14,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:15:14,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:15:14,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:15:14,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:15:14,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2023-11-29 05:15:14,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2023-11-29 05:15:15,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2023-11-29 05:15:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:16,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:15:17,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 182 [2023-11-29 05:15:17,358 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:15:17,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159664 treesize of output 159280 [2023-11-29 05:15:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:19,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334916829] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:15:19,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:15:19,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 35] total 94 [2023-11-29 05:15:19,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747170606] [2023-11-29 05:15:19,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:15:19,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-11-29 05:15:19,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:15:19,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-11-29 05:15:19,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=8345, Unknown=0, NotChecked=0, Total=8742 [2023-11-29 05:15:19,468 INFO L87 Difference]: Start difference. First operand 189 states and 216 transitions. Second operand has 94 states, 94 states have (on average 1.5957446808510638) internal successors, (150), 94 states have internal predecessors, (150), 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 05:15:34,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:15:34,998 INFO L93 Difference]: Finished difference Result 528 states and 573 transitions. [2023-11-29 05:15:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2023-11-29 05:15:34,998 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.5957446808510638) internal successors, (150), 94 states have internal predecessors, (150), 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 53 [2023-11-29 05:15:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:15:35,000 INFO L225 Difference]: With dead ends: 528 [2023-11-29 05:15:35,000 INFO L226 Difference]: Without dead ends: 495 [2023-11-29 05:15:35,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17475 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=2975, Invalid=58777, Unknown=0, NotChecked=0, Total=61752 [2023-11-29 05:15:35,005 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 655 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 5526 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 5816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 5526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:15:35,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 1913 Invalid, 5816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 5526 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-29 05:15:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2023-11-29 05:15:35,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 192. [2023-11-29 05:15:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.162303664921466) internal successors, (222), 191 states have internal predecessors, (222), 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 05:15:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 222 transitions. [2023-11-29 05:15:35,298 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 222 transitions. Word has length 53 [2023-11-29 05:15:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:15:35,298 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 222 transitions. [2023-11-29 05:15:35,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.5957446808510638) internal successors, (150), 94 states have internal predecessors, (150), 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 05:15:35,298 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 222 transitions. [2023-11-29 05:15:35,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 05:15:35,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:15:35,299 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:15:35,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 05:15:35,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 05:15:35,499 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:15:35,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:15:35,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1661756158, now seen corresponding path program 27 times [2023-11-29 05:15:35,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:15:35,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383468714] [2023-11-29 05:15:35,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:15:35,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:15:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 1 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:38,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:38,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383468714] [2023-11-29 05:15:38,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383468714] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:15:38,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890315946] [2023-11-29 05:15:38,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:15:38,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:15:38,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:15:38,010 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:15:38,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 05:15:38,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-29 05:15:38,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:15:38,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-29 05:15:38,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:15:39,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 05:15:39,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:15:39,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2023-11-29 05:15:39,331 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 05:15:39,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:15:39,345 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-11-29 05:15:39,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 27 [2023-11-29 05:15:39,433 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 05:15:39,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:15:39,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:15:39,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 27 [2023-11-29 05:15:39,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:15:39,538 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-11-29 05:15:39,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 31 [2023-11-29 05:15:39,638 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 05:15:39,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:15:39,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:15:39,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 30 [2023-11-29 05:15:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:15:41,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:15:42,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 119 [2023-11-29 05:15:45,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1449905146314 treesize of output 1449636710858 [2023-11-29 05:16:19,252 WARN L293 SmtUtils]: Spent 33.16s on a formula simplification. DAG size of input: 184708 DAG size of output: 233 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 05:16:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 05:16:20,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890315946] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:16:20,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:16:20,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 22] total 82 [2023-11-29 05:16:20,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329999993] [2023-11-29 05:16:20,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:16:20,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-11-29 05:16:20,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:16:20,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-11-29 05:16:20,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=5976, Unknown=0, NotChecked=0, Total=6642 [2023-11-29 05:16:20,762 INFO L87 Difference]: Start difference. First operand 192 states and 222 transitions. Second operand has 82 states, 82 states have (on average 1.7682926829268293) internal successors, (145), 82 states have internal predecessors, (145), 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 05:16:25,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:16:25,466 INFO L93 Difference]: Finished difference Result 209 states and 238 transitions. [2023-11-29 05:16:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 05:16:25,466 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.7682926829268293) internal successors, (145), 82 states have internal predecessors, (145), 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 53 [2023-11-29 05:16:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:16:25,467 INFO L225 Difference]: With dead ends: 209 [2023-11-29 05:16:25,467 INFO L226 Difference]: Without dead ends: 168 [2023-11-29 05:16:25,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4302 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2232, Invalid=14798, Unknown=0, NotChecked=0, Total=17030 [2023-11-29 05:16:25,469 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 239 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:16:25,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 276 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1454 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 05:16:25,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-29 05:16:25,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 153. [2023-11-29 05:16:25,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.1973684210526316) internal successors, (182), 152 states have internal predecessors, (182), 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 05:16:25,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2023-11-29 05:16:25,692 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 53 [2023-11-29 05:16:25,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:16:25,693 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2023-11-29 05:16:25,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.7682926829268293) internal successors, (145), 82 states have internal predecessors, (145), 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 05:16:25,693 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2023-11-29 05:16:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 05:16:25,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:16:25,694 INFO L195 NwaCegarLoop]: trace histogram [14, 9, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:16:25,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 05:16:25,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:16:25,894 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:16:25,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:16:25,894 INFO L85 PathProgramCache]: Analyzing trace with hash 2140885703, now seen corresponding path program 28 times [2023-11-29 05:16:25,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:16:25,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963509939] [2023-11-29 05:16:25,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:16:25,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:16:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:16:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 78 proven. 48 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-29 05:16:26,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:16:26,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963509939] [2023-11-29 05:16:26,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963509939] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:16:26,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807007388] [2023-11-29 05:16:26,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:16:26,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:16:26,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:16:26,631 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:16:26,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 05:16:26,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:16:26,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:16:26,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-29 05:16:26,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:16:26,958 INFO L349 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2023-11-29 05:16:26,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 21 [2023-11-29 05:16:27,019 INFO L349 Elim1Store]: treesize reduction 47, result has 25.4 percent of original size [2023-11-29 05:16:27,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 29 [2023-11-29 05:16:27,083 INFO L349 Elim1Store]: treesize reduction 51, result has 19.0 percent of original size [2023-11-29 05:16:27,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 29 [2023-11-29 05:16:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-29 05:16:27,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:16:28,749 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 05:16:28,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 78 [2023-11-29 05:16:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-29 05:16:29,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807007388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:16:29,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:16:29,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 22] total 65 [2023-11-29 05:16:29,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079096646] [2023-11-29 05:16:29,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:16:29,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-29 05:16:29,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:16:29,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-29 05:16:29,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=3612, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 05:16:29,091 INFO L87 Difference]: Start difference. First operand 153 states and 182 transitions. Second operand has 65 states, 65 states have (on average 1.6923076923076923) internal successors, (110), 65 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:37,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:16:37,606 INFO L93 Difference]: Finished difference Result 385 states and 422 transitions. [2023-11-29 05:16:37,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-11-29 05:16:37,607 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.6923076923076923) internal successors, (110), 65 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-29 05:16:37,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:16:37,608 INFO L225 Difference]: With dead ends: 385 [2023-11-29 05:16:37,608 INFO L226 Difference]: Without dead ends: 340 [2023-11-29 05:16:37,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7231 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3012, Invalid=22748, Unknown=0, NotChecked=0, Total=25760 [2023-11-29 05:16:37,611 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 524 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 2612 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 2827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 2612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:16:37,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 1099 Invalid, 2827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 2612 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 05:16:37,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-11-29 05:16:37,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 190. [2023-11-29 05:16:37,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.1534391534391535) internal successors, (218), 189 states have internal predecessors, (218), 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 05:16:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 218 transitions. [2023-11-29 05:16:37,909 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 218 transitions. Word has length 55 [2023-11-29 05:16:37,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:16:37,909 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 218 transitions. [2023-11-29 05:16:37,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.6923076923076923) internal successors, (110), 65 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:37,909 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 218 transitions. [2023-11-29 05:16:37,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 05:16:37,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:16:37,910 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:16:37,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 05:16:38,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:16:38,110 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:16:38,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:16:38,111 INFO L85 PathProgramCache]: Analyzing trace with hash -425333593, now seen corresponding path program 29 times [2023-11-29 05:16:38,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:16:38,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017502356] [2023-11-29 05:16:38,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:16:38,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:16:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:16:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 67 proven. 116 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-29 05:16:39,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:16:39,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017502356] [2023-11-29 05:16:39,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017502356] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:16:39,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868114669] [2023-11-29 05:16:39,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:16:39,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:16:39,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:16:39,116 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:16:39,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 05:17:48,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 05:17:48,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:17:48,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:17:48,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:17:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-29 05:17:48,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:17:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-29 05:17:49,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868114669] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:17:49,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:17:49,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27, 27] total 81 [2023-11-29 05:17:49,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187635319] [2023-11-29 05:17:49,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:17:49,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-11-29 05:17:49,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:17:49,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-11-29 05:17:49,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1274, Invalid=5206, Unknown=0, NotChecked=0, Total=6480 [2023-11-29 05:17:49,841 INFO L87 Difference]: Start difference. First operand 190 states and 218 transitions. Second operand has 81 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 81 states have internal predecessors, (96), 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 05:17:52,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:17:52,062 INFO L93 Difference]: Finished difference Result 486 states and 532 transitions. [2023-11-29 05:17:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-29 05:17:52,063 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 81 states have internal predecessors, (96), 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 55 [2023-11-29 05:17:52,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:17:52,065 INFO L225 Difference]: With dead ends: 486 [2023-11-29 05:17:52,065 INFO L226 Difference]: Without dead ends: 398 [2023-11-29 05:17:52,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4873 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3580, Invalid=10940, Unknown=0, NotChecked=0, Total=14520 [2023-11-29 05:17:52,067 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1008 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:17:52,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 345 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:17:52,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-11-29 05:17:52,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 213. [2023-11-29 05:17:52,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.1415094339622642) internal successors, (242), 212 states have internal predecessors, (242), 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 05:17:52,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 242 transitions. [2023-11-29 05:17:52,409 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 242 transitions. Word has length 55 [2023-11-29 05:17:52,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:17:52,409 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 242 transitions. [2023-11-29 05:17:52,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 81 states have internal predecessors, (96), 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 05:17:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 242 transitions. [2023-11-29 05:17:52,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 05:17:52,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:17:52,410 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:17:52,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 05:17:52,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:17:52,610 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:17:52,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:17:52,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1832390975, now seen corresponding path program 30 times [2023-11-29 05:17:52,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:17:52,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278790068] [2023-11-29 05:17:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:17:52,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:17:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:17:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 6 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:17:55,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:17:55,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278790068] [2023-11-29 05:17:55,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278790068] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:17:55,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567600062] [2023-11-29 05:17:55,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:17:55,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:17:55,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:17:55,754 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:17:55,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 05:17:56,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-11-29 05:17:56,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:17:56,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-29 05:17:56,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:17:57,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:17:57,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 05:17:57,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:17:57,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2023-11-29 05:17:57,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:17:57,404 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-11-29 05:17:57,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 27 [2023-11-29 05:17:57,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:17:57,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:17:57,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 27 [2023-11-29 05:17:57,504 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 05:17:57,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:17:57,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:17:57,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-11-29 05:17:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 05:17:58,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:18:00,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 112 [2023-11-29 05:18:00,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11911666646 treesize of output 11903278038 [2023-11-29 05:18:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 05:18:05,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567600062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:18:05,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:18:05,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 25, 23] total 78 [2023-11-29 05:18:05,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931933727] [2023-11-29 05:18:05,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:18:05,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-11-29 05:18:05,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:18:05,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-11-29 05:18:05,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=5604, Unknown=0, NotChecked=0, Total=6006 [2023-11-29 05:18:05,602 INFO L87 Difference]: Start difference. First operand 213 states and 242 transitions. Second operand has 78 states, 78 states have (on average 1.8205128205128205) internal successors, (142), 78 states have internal predecessors, (142), 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 05:18:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:18:19,271 INFO L93 Difference]: Finished difference Result 277 states and 304 transitions. [2023-11-29 05:18:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-11-29 05:18:19,272 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.8205128205128205) internal successors, (142), 78 states have internal predecessors, (142), 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 56 [2023-11-29 05:18:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:18:19,273 INFO L225 Difference]: With dead ends: 277 [2023-11-29 05:18:19,273 INFO L226 Difference]: Without dead ends: 275 [2023-11-29 05:18:19,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8993 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=3768, Invalid=29538, Unknown=0, NotChecked=0, Total=33306 [2023-11-29 05:18:19,275 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 808 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 2149 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 2149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:18:19,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 595 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 2149 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 05:18:19,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-11-29 05:18:19,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 242. [2023-11-29 05:18:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.1244813278008299) internal successors, (271), 241 states have internal predecessors, (271), 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 05:18:19,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 271 transitions. [2023-11-29 05:18:19,712 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 271 transitions. Word has length 56 [2023-11-29 05:18:19,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:18:19,712 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 271 transitions. [2023-11-29 05:18:19,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.8205128205128205) internal successors, (142), 78 states have internal predecessors, (142), 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 05:18:19,712 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 271 transitions. [2023-11-29 05:18:19,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 05:18:19,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:18:19,713 INFO L195 NwaCegarLoop]: trace histogram [18, 12, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:18:19,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 05:18:19,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:18:19,913 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:18:19,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:18:19,914 INFO L85 PathProgramCache]: Analyzing trace with hash -200590041, now seen corresponding path program 31 times [2023-11-29 05:18:19,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:18:19,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020364119] [2023-11-29 05:18:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:18:19,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:18:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:18:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 67 proven. 182 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-29 05:18:21,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:18:21,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020364119] [2023-11-29 05:18:21,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020364119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:18:21,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258980294] [2023-11-29 05:18:21,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:18:21,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:18:21,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:18:21,073 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:18:21,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 05:18:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:18:21,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 05:18:21,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:18:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 78 proven. 171 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-29 05:18:22,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:18:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 78 proven. 171 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-29 05:18:23,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258980294] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:18:23,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:18:23,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 99 [2023-11-29 05:18:23,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038413181] [2023-11-29 05:18:23,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:18:23,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-11-29 05:18:23,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:18:23,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-11-29 05:18:23,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1940, Invalid=7762, Unknown=0, NotChecked=0, Total=9702 [2023-11-29 05:18:23,517 INFO L87 Difference]: Start difference. First operand 242 states and 271 transitions. Second operand has 99 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 99 states have internal predecessors, (113), 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 05:18:27,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:18:27,768 INFO L93 Difference]: Finished difference Result 651 states and 699 transitions. [2023-11-29 05:18:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-11-29 05:18:27,769 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 99 states have internal predecessors, (113), 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 59 [2023-11-29 05:18:27,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:18:27,771 INFO L225 Difference]: With dead ends: 651 [2023-11-29 05:18:27,771 INFO L226 Difference]: Without dead ends: 561 [2023-11-29 05:18:27,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9397 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=7651, Invalid=22105, Unknown=0, NotChecked=0, Total=29756 [2023-11-29 05:18:27,774 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1966 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1966 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:18:27,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1966 Valid, 520 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 05:18:27,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2023-11-29 05:18:28,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 267. [2023-11-29 05:18:28,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.131578947368421) internal successors, (301), 266 states have internal predecessors, (301), 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 05:18:28,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 301 transitions. [2023-11-29 05:18:28,244 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 301 transitions. Word has length 59 [2023-11-29 05:18:28,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:18:28,244 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 301 transitions. [2023-11-29 05:18:28,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 99 states have internal predecessors, (113), 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 05:18:28,244 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 301 transitions. [2023-11-29 05:18:28,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 05:18:28,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:18:28,245 INFO L195 NwaCegarLoop]: trace histogram [16, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:18:28,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-29 05:18:28,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:18:28,445 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:18:28,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:18:28,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1829112551, now seen corresponding path program 32 times [2023-11-29 05:18:28,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:18:28,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666084225] [2023-11-29 05:18:28,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:18:28,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:18:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:18:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 15 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:18:31,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:18:31,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666084225] [2023-11-29 05:18:31,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666084225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:18:31,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36381749] [2023-11-29 05:18:31,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:18:31,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:18:31,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:18:31,378 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:18:31,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 05:18:31,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:18:31,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:18:31,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-29 05:18:31,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:18:32,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2023-11-29 05:18:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:18:34,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:18:35,309 INFO L349 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2023-11-29 05:18:35,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 76 [2023-11-29 05:18:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:18:37,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36381749] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:18:37,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:18:37,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 41] total 116 [2023-11-29 05:18:37,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060924735] [2023-11-29 05:18:37,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:18:37,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2023-11-29 05:18:37,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:18:37,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2023-11-29 05:18:37,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=12669, Unknown=0, NotChecked=0, Total=13340 [2023-11-29 05:18:37,082 INFO L87 Difference]: Start difference. First operand 267 states and 301 transitions. Second operand has 116 states, 116 states have (on average 1.4827586206896552) internal successors, (172), 116 states have internal predecessors, (172), 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 05:18:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:18:58,725 INFO L93 Difference]: Finished difference Result 591 states and 629 transitions. [2023-11-29 05:18:58,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2023-11-29 05:18:58,725 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.4827586206896552) internal successors, (172), 116 states have internal predecessors, (172), 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 59 [2023-11-29 05:18:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:18:58,728 INFO L225 Difference]: With dead ends: 591 [2023-11-29 05:18:58,728 INFO L226 Difference]: Without dead ends: 544 [2023-11-29 05:18:58,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 343 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36610 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=5320, Invalid=113360, Unknown=0, NotChecked=0, Total=118680 [2023-11-29 05:18:58,737 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 1299 mSDsluCounter, 3425 mSDsCounter, 0 mSdLazyCounter, 7875 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 3500 SdHoareTripleChecker+Invalid, 8359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 7875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:18:58,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1299 Valid, 3500 Invalid, 8359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 7875 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-29 05:18:58,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2023-11-29 05:18:59,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 261. [2023-11-29 05:18:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.1346153846153846) internal successors, (295), 260 states have internal predecessors, (295), 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 05:18:59,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 295 transitions. [2023-11-29 05:18:59,195 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 295 transitions. Word has length 59 [2023-11-29 05:18:59,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:18:59,195 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 295 transitions. [2023-11-29 05:18:59,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.4827586206896552) internal successors, (172), 116 states have internal predecessors, (172), 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 05:18:59,195 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 295 transitions. [2023-11-29 05:18:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 05:18:59,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:18:59,195 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:18:59,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 05:18:59,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:18:59,396 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:18:59,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:18:59,396 INFO L85 PathProgramCache]: Analyzing trace with hash 280031303, now seen corresponding path program 33 times [2023-11-29 05:18:59,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:18:59,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735166029] [2023-11-29 05:18:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:18:59,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:18:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:19:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 3 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:19:02,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:19:02,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735166029] [2023-11-29 05:19:02,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735166029] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:19:02,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800328575] [2023-11-29 05:19:02,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:19:02,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:19:02,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:19:02,731 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:19:02,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 05:19:03,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 05:19:03,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:19:03,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-29 05:19:03,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:19:03,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:19:04,168 INFO L349 Elim1Store]: treesize reduction 26, result has 44.7 percent of original size [2023-11-29 05:19:04,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 21 [2023-11-29 05:19:04,265 INFO L349 Elim1Store]: treesize reduction 50, result has 43.2 percent of original size [2023-11-29 05:19:04,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 50 [2023-11-29 05:19:04,366 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 05:19:04,394 INFO L349 Elim1Store]: treesize reduction 73, result has 28.4 percent of original size [2023-11-29 05:19:04,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 57 [2023-11-29 05:19:04,556 INFO L349 Elim1Store]: treesize reduction 73, result has 28.4 percent of original size [2023-11-29 05:19:04,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 87 treesize of output 61 [2023-11-29 05:19:04,704 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 05:19:04,731 INFO L349 Elim1Store]: treesize reduction 73, result has 28.4 percent of original size [2023-11-29 05:19:04,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 64 [2023-11-29 05:19:04,897 INFO L349 Elim1Store]: treesize reduction 77, result has 24.5 percent of original size [2023-11-29 05:19:04,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 63 [2023-11-29 05:19:04,913 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 05:19:06,733 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:19:06,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 67 [2023-11-29 05:19:06,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:19:06,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 49 [2023-11-29 05:19:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 155 proven. 33 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 05:19:06,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:21:47,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 175 [2023-11-29 05:21:51,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132575236870514 treesize of output 132568794419570 [2023-11-29 05:22:44,653 WARN L293 SmtUtils]: Spent 51.44s on a formula simplification. DAG size of input: 270530 DAG size of output: 278 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 05:22:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 128 proven. 48 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 05:22:46,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800328575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:22:46,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:22:46,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 26, 24] total 81 [2023-11-29 05:22:46,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055068446] [2023-11-29 05:22:46,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:22:46,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-11-29 05:22:46,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:22:46,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-11-29 05:22:46,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=5792, Unknown=47, NotChecked=0, Total=6480 [2023-11-29 05:22:46,885 INFO L87 Difference]: Start difference. First operand 261 states and 295 transitions. Second operand has 81 states, 81 states have (on average 1.8641975308641976) internal successors, (151), 81 states have internal predecessors, (151), 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 05:22:55,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:22:56,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:23:00,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:23:02,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:23:17,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:23:39,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:23:39,815 INFO L93 Difference]: Finished difference Result 270 states and 303 transitions. [2023-11-29 05:23:39,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-29 05:23:39,816 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.8641975308641976) internal successors, (151), 81 states have internal predecessors, (151), 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 59 [2023-11-29 05:23:39,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:23:39,817 INFO L225 Difference]: With dead ends: 270 [2023-11-29 05:23:39,817 INFO L226 Difference]: Without dead ends: 222 [2023-11-29 05:23:39,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4809 ImplicationChecksByTransitivity, 196.1s TimeCoverageRelationStatistics Valid=3129, Invalid=18869, Unknown=54, NotChecked=0, Total=22052 [2023-11-29 05:23:39,820 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 380 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 222 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:23:39,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 344 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1878 Invalid, 6 Unknown, 0 Unchecked, 19.6s Time] [2023-11-29 05:23:39,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-11-29 05:23:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2023-11-29 05:23:40,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.1542056074766356) internal successors, (247), 214 states have internal predecessors, (247), 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 05:23:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 247 transitions. [2023-11-29 05:23:40,206 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 247 transitions. Word has length 59 [2023-11-29 05:23:40,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:23:40,206 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 247 transitions. [2023-11-29 05:23:40,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.8641975308641976) internal successors, (151), 81 states have internal predecessors, (151), 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 05:23:40,206 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 247 transitions. [2023-11-29 05:23:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 05:23:40,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:23:40,207 INFO L195 NwaCegarLoop]: trace histogram [18, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:23:40,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 05:23:40,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:23:40,407 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:23:40,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:23:40,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1437852889, now seen corresponding path program 34 times [2023-11-29 05:23:40,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:23:40,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946072591] [2023-11-29 05:23:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:23:40,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:23:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:23:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 136 proven. 71 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-29 05:23:41,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:23:41,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946072591] [2023-11-29 05:23:41,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946072591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:23:41,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992903549] [2023-11-29 05:23:41,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:23:41,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:23:41,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:23:41,607 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:23:41,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 05:23:41,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:23:41,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:23:41,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-29 05:23:41,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:23:42,182 INFO L349 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2023-11-29 05:23:42,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 21 [2023-11-29 05:23:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-29 05:23:43,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:23:43,976 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 05:23:43,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 33 [2023-11-29 05:23:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-29 05:23:44,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992903549] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:23:44,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:23:44,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 24, 24] total 75 [2023-11-29 05:23:44,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595348053] [2023-11-29 05:23:44,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:23:44,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-11-29 05:23:44,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:23:44,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-11-29 05:23:44,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=4853, Unknown=0, NotChecked=0, Total=5550 [2023-11-29 05:23:44,616 INFO L87 Difference]: Start difference. First operand 215 states and 247 transitions. Second operand has 75 states, 75 states have (on average 1.6) internal successors, (120), 75 states have internal predecessors, (120), 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 05:23:58,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:23:58,070 INFO L93 Difference]: Finished difference Result 445 states and 478 transitions. [2023-11-29 05:23:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2023-11-29 05:23:58,070 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.6) internal successors, (120), 75 states have internal predecessors, (120), 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 61 [2023-11-29 05:23:58,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:23:58,072 INFO L225 Difference]: With dead ends: 445 [2023-11-29 05:23:58,072 INFO L226 Difference]: Without dead ends: 369 [2023-11-29 05:23:58,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11472 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=4716, Invalid=35484, Unknown=0, NotChecked=0, Total=40200 [2023-11-29 05:23:58,076 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 458 mSDsluCounter, 2642 mSDsCounter, 0 mSdLazyCounter, 5189 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 2753 SdHoareTripleChecker+Invalid, 5367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 5189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:23:58,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 2753 Invalid, 5367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 5189 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-29 05:23:58,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-11-29 05:23:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 189. [2023-11-29 05:23:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.1170212765957446) internal successors, (210), 188 states have internal predecessors, (210), 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 05:23:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 210 transitions. [2023-11-29 05:23:58,466 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 210 transitions. Word has length 61 [2023-11-29 05:23:58,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:23:58,467 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 210 transitions. [2023-11-29 05:23:58,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.6) internal successors, (120), 75 states have internal predecessors, (120), 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 05:23:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 210 transitions. [2023-11-29 05:23:58,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 05:23:58,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:23:58,468 INFO L195 NwaCegarLoop]: trace histogram [14, 11, 10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:23:58,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 05:23:58,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 05:23:58,668 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:23:58,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:23:58,668 INFO L85 PathProgramCache]: Analyzing trace with hash -605609466, now seen corresponding path program 35 times [2023-11-29 05:23:58,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:23:58,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121813938] [2023-11-29 05:23:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:23:58,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:23:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:24:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 10 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:24:03,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:24:03,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121813938] [2023-11-29 05:24:03,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121813938] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:24:03,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720572390] [2023-11-29 05:24:03,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:24:03,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:24:03,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:24:03,029 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:24:03,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b083cb-a4ee-40ca-889c-e0b92eed39e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 05:24:10,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-29 05:24:10,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:24:10,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-29 05:24:10,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:24:11,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2023-11-29 05:24:11,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2023-11-29 05:24:11,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2023-11-29 05:24:11,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2023-11-29 05:24:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:24:12,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:24:14,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:24:14,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 95 [2023-11-29 05:24:14,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 82 [2023-11-29 05:24:14,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1891702 treesize of output 1889654 [2023-11-29 05:24:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:24:17,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720572390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:24:17,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:24:17,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 112 [2023-11-29 05:24:17,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848677731] [2023-11-29 05:24:17,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:24:17,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2023-11-29 05:24:17,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:24:17,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2023-11-29 05:24:17,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=11880, Unknown=0, NotChecked=0, Total=12432 [2023-11-29 05:24:17,267 INFO L87 Difference]: Start difference. First operand 189 states and 210 transitions. Second operand has 112 states, 112 states have (on average 1.6160714285714286) internal successors, (181), 112 states have internal predecessors, (181), 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)