./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/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_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/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_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/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 b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:29:16,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:29:16,756 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 03:29:16,761 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:29:16,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:29:16,786 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:29:16,786 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:29:16,787 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:29:16,788 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:29:16,788 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:29:16,789 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:29:16,789 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:29:16,790 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:29:16,791 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:29:16,791 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:29:16,792 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:29:16,792 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:29:16,793 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:29:16,793 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:29:16,794 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:29:16,794 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:29:16,795 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:29:16,796 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:29:16,796 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:29:16,796 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:29:16,797 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:29:16,797 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:29:16,798 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:29:16,798 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:29:16,799 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:29:16,799 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:29:16,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:29:16,800 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:29:16,800 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:29:16,800 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:29:16,800 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:29:16,800 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:29:16,801 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:29:16,801 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:29:16,801 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:29:16,801 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:29:16,802 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:29:16,802 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_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2023-11-29 03:29:17,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:29:17,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:29:17,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:29:17,050 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:29:17,051 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:29:17,052 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2023-11-29 03:29:19,868 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:29:20,036 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:29:20,036 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2023-11-29 03:29:20,044 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/data/2cf934875/e96e5a7f4fa64dff85145028bed6419a/FLAG5f5281cd2 [2023-11-29 03:29:20,059 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/data/2cf934875/e96e5a7f4fa64dff85145028bed6419a [2023-11-29 03:29:20,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:29:20,064 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:29:20,066 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:29:20,066 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:29:20,071 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:29:20,072 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:29:20" (1/1) ... [2023-11-29 03:29:20,073 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58636255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:20, skipping insertion in model container [2023-11-29 03:29:20,074 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:29:20" (1/1) ... [2023-11-29 03:29:20,097 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:29:20,257 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_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2023-11-29 03:29:20,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:29:20,286 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:29:20,299 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_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2023-11-29 03:29:20,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:29:20,322 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:29:20,323 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:20 WrapperNode [2023-11-29 03:29:20,323 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:29:20,324 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:29:20,324 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:29:20,324 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:29:20,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:20" (1/1) ... [2023-11-29 03:29:20,339 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:20" (1/1) ... [2023-11-29 03:29:20,359 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2023-11-29 03:29:20,359 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:29:20,360 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:29:20,360 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:29:20,360 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:29:20,373 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:20" (1/1) ... [2023-11-29 03:29:20,373 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:20" (1/1) ... [2023-11-29 03:29:20,375 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:20" (1/1) ... [2023-11-29 03:29:20,389 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-29 03:29:20,390 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:20" (1/1) ... [2023-11-29 03:29:20,390 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:20" (1/1) ... [2023-11-29 03:29:20,395 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:20" (1/1) ... [2023-11-29 03:29:20,399 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:20" (1/1) ... [2023-11-29 03:29:20,400 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:20" (1/1) ... [2023-11-29 03:29:20,401 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:20" (1/1) ... [2023-11-29 03:29:20,403 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:29:20,404 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:29:20,405 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:29:20,405 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:29:20,406 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:20" (1/1) ... [2023-11-29 03:29:20,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:29:20,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:29:20,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:29:20,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:29:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:29:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 03:29:20,470 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 03:29:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:29:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 03:29:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 03:29:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 03:29:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 03:29:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:29:20,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:29:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 03:29:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 03:29:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 03:29:20,554 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:29:20,557 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:29:20,697 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:29:20,724 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:29:20,724 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 03:29:20,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:29:20 BoogieIcfgContainer [2023-11-29 03:29:20,725 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:29:20,727 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:29:20,728 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:29:20,731 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:29:20,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:29:20" (1/3) ... [2023-11-29 03:29:20,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11046f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:29:20, skipping insertion in model container [2023-11-29 03:29:20,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:29:20" (2/3) ... [2023-11-29 03:29:20,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11046f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:29:20, skipping insertion in model container [2023-11-29 03:29:20,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:29:20" (3/3) ... [2023-11-29 03:29:20,734 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2023-11-29 03:29:20,754 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:29:20,754 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:29:20,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:29:20,802 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;@752e520b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:29:20,802 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 03:29:20,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 03:29:20,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 03:29:20,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:20,813 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:20,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:20,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:20,818 INFO L85 PathProgramCache]: Analyzing trace with hash 485743062, now seen corresponding path program 1 times [2023-11-29 03:29:20,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:20,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229650131] [2023-11-29 03:29:20,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:20,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:20,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:29:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:20,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:29:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 03:29:21,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:29:21,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229650131] [2023-11-29 03:29:21,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229650131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:29:21,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:29:21,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:29:21,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364797739] [2023-11-29 03:29:21,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:29:21,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 03:29:21,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:29:21,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 03:29:21,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:29:21,041 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 03:29:21,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:29:21,073 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2023-11-29 03:29:21,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 03:29:21,076 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), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-29 03:29:21,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:29:21,082 INFO L225 Difference]: With dead ends: 38 [2023-11-29 03:29:21,083 INFO L226 Difference]: Without dead ends: 18 [2023-11-29 03:29:21,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 03:29:21,090 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:29:21,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:29:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-29 03:29:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-29 03:29:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 03:29:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-11-29 03:29:21,128 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 18 [2023-11-29 03:29:21,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:29:21,129 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-11-29 03:29:21,129 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), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 03:29:21,129 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-11-29 03:29:21,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 03:29:21,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:21,131 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:21,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 03:29:21,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:21,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:21,132 INFO L85 PathProgramCache]: Analyzing trace with hash -121450414, now seen corresponding path program 1 times [2023-11-29 03:29:21,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:21,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494814492] [2023-11-29 03:29:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:21,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:21,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:29:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:21,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:29:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 03:29:21,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:29:21,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494814492] [2023-11-29 03:29:21,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494814492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:29:21,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:29:21,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:29:21,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470095599] [2023-11-29 03:29:21,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:29:21,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:29:21,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:29:21,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:29:21,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:29:21,353 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 03:29:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:29:21,392 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-11-29 03:29:21,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:29:21,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-11-29 03:29:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:29:21,394 INFO L225 Difference]: With dead ends: 33 [2023-11-29 03:29:21,394 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 03:29:21,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:29:21,397 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:29:21,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:29:21,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 03:29:21,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2023-11-29 03:29:21,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 03:29:21,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-29 03:29:21,406 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 18 [2023-11-29 03:29:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:29:21,406 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-29 03:29:21,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 03:29:21,407 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-29 03:29:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 03:29:21,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:21,408 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:21,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 03:29:21,409 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:21,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:21,409 INFO L85 PathProgramCache]: Analyzing trace with hash -787434959, now seen corresponding path program 1 times [2023-11-29 03:29:21,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:21,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146292199] [2023-11-29 03:29:21,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:21,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:21,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:29:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:21,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:29:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:21,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:29:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 03:29:21,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:29:21,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146292199] [2023-11-29 03:29:21,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146292199] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:29:21,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129050668] [2023-11-29 03:29:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:21,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:21,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:29:21,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:29:21,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:29:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:21,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 03:29:21,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:29:22,192 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 03:29:22,293 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 22 treesize of output 10 [2023-11-29 03:29:22,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 03:29:22,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:29:22,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:29:22,367 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 23 treesize of output 19 [2023-11-29 03:29:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 03:29:22,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129050668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:29:22,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:29:22,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2023-11-29 03:29:22,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310607965] [2023-11-29 03:29:22,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:29:22,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 03:29:22,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:29:22,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 03:29:22,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-29 03:29:22,516 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-29 03:29:22,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:29:22,793 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-11-29 03:29:22,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 03:29:22,793 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 25 [2023-11-29 03:29:22,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:29:22,794 INFO L225 Difference]: With dead ends: 40 [2023-11-29 03:29:22,794 INFO L226 Difference]: Without dead ends: 38 [2023-11-29 03:29:22,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2023-11-29 03:29:22,796 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:29:22,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 135 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:29:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-29 03:29:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2023-11-29 03:29:22,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 03:29:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-11-29 03:29:22,805 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 25 [2023-11-29 03:29:22,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:29:22,805 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-11-29 03:29:22,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-29 03:29:22,806 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-11-29 03:29:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 03:29:22,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:22,807 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:22,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:29:23,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 03:29:23,008 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:23,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash 642107988, now seen corresponding path program 1 times [2023-11-29 03:29:23,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:23,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720901340] [2023-11-29 03:29:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:23,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:23,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:29:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:23,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:29:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:23,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:29:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 03:29:23,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:29:23,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720901340] [2023-11-29 03:29:23,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720901340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:29:23,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509557610] [2023-11-29 03:29:23,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:23,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:23,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:29:23,114 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:29:23,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:29:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:23,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:29:23,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:29:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 03:29:23,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:29:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 03:29:23,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509557610] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:29:23,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:29:23,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-29 03:29:23,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132443489] [2023-11-29 03:29:23,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:29:23,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 03:29:23,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:29:23,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 03:29:23,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:29:23,299 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 03:29:23,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:29:23,370 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2023-11-29 03:29:23,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 03:29:23,371 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-11-29 03:29:23,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:29:23,372 INFO L225 Difference]: With dead ends: 44 [2023-11-29 03:29:23,372 INFO L226 Difference]: Without dead ends: 34 [2023-11-29 03:29:23,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-29 03:29:23,373 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:29:23,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 57 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:29:23,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-29 03:29:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 22. [2023-11-29 03:29:23,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 03:29:23,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-29 03:29:23,380 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-11-29 03:29:23,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:29:23,380 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-29 03:29:23,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 03:29:23,381 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-29 03:29:23,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 03:29:23,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:23,382 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:23,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 03:29:23,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:23,583 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:23,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:23,583 INFO L85 PathProgramCache]: Analyzing trace with hash -575027342, now seen corresponding path program 2 times [2023-11-29 03:29:23,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:23,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652345559] [2023-11-29 03:29:23,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:23,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:23,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:29:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:23,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:29:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:23,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:29:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:23,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:29:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 03:29:23,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:29:23,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652345559] [2023-11-29 03:29:23,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652345559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:29:23,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212579616] [2023-11-29 03:29:23,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:29:23,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:23,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:29:23,981 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:29:23,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:29:24,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:29:24,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:29:24,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 03:29:24,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:29:24,244 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 03:29:24,453 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 30 treesize of output 14 [2023-11-29 03:29:24,575 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 22 treesize of output 10 [2023-11-29 03:29:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 03:29:24,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:29:28,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212579616] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:29:28,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:29:28,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2023-11-29 03:29:28,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118009129] [2023-11-29 03:29:28,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:29:28,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 03:29:28,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:29:28,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 03:29:28,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=545, Unknown=1, NotChecked=0, Total=650 [2023-11-29 03:29:28,792 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 18 states have internal predecessors, (31), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-29 03:29:33,964 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 03:29:42,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 03:29:42,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:29:42,202 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2023-11-29 03:29:42,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 03:29:42,205 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 18 states have internal predecessors, (31), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 32 [2023-11-29 03:29:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:29:42,207 INFO L225 Difference]: With dead ends: 59 [2023-11-29 03:29:42,207 INFO L226 Difference]: Without dead ends: 57 [2023-11-29 03:29:42,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=338, Invalid=1466, Unknown=2, NotChecked=0, Total=1806 [2023-11-29 03:29:42,209 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 207 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 41 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-11-29 03:29:42,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 140 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 241 Invalid, 3 Unknown, 0 Unchecked, 8.9s Time] [2023-11-29 03:29:42,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-29 03:29:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2023-11-29 03:29:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 03:29:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-11-29 03:29:42,220 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 32 [2023-11-29 03:29:42,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:29:42,221 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-11-29 03:29:42,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 18 states have internal predecessors, (31), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-29 03:29:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-11-29 03:29:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 03:29:42,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:42,222 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:42,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 03:29:42,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:42,423 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:42,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:42,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1990599027, now seen corresponding path program 2 times [2023-11-29 03:29:42,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:42,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131387096] [2023-11-29 03:29:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:42,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:42,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:29:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:42,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:29:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:42,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:29:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:42,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:29:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 03:29:42,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:29:42,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131387096] [2023-11-29 03:29:42,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131387096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:29:42,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726819560] [2023-11-29 03:29:42,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:29:42,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:42,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:29:42,793 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:29:42,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:29:42,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:29:42,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:29:42,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 03:29:42,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:29:43,072 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 03:29:43,386 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 03:29:43,387 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 38 treesize of output 17 [2023-11-29 03:29:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 03:29:43,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:29:43,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-29 03:29:43,638 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 29 treesize of output 23 [2023-11-29 03:29:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 03:29:44,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726819560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:29:44,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:29:44,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 13] total 31 [2023-11-29 03:29:44,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892873686] [2023-11-29 03:29:44,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:29:44,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 03:29:44,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:29:44,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 03:29:44,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2023-11-29 03:29:44,006 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 25 states have internal predecessors, (47), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2023-11-29 03:29:45,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:29:45,061 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2023-11-29 03:29:45,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 03:29:45,062 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 25 states have internal predecessors, (47), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 35 [2023-11-29 03:29:45,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:29:45,064 INFO L225 Difference]: With dead ends: 51 [2023-11-29 03:29:45,064 INFO L226 Difference]: Without dead ends: 41 [2023-11-29 03:29:45,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=431, Invalid=2019, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 03:29:45,067 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:29:45,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 137 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:29:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-29 03:29:45,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2023-11-29 03:29:45,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 03:29:45,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-11-29 03:29:45,077 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 35 [2023-11-29 03:29:45,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:29:45,077 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-11-29 03:29:45,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 25 states have internal predecessors, (47), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2023-11-29 03:29:45,078 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-11-29 03:29:45,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 03:29:45,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:45,079 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:45,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:29:45,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:45,285 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:45,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:45,285 INFO L85 PathProgramCache]: Analyzing trace with hash 348805492, now seen corresponding path program 3 times [2023-11-29 03:29:45,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:45,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138206125] [2023-11-29 03:29:45,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:45,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:45,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:29:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:45,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:29:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:45,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:29:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:45,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:29:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:45,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:29:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 03:29:45,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:29:45,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138206125] [2023-11-29 03:29:45,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138206125] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:29:45,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378471351] [2023-11-29 03:29:45,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:29:45,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:45,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:29:45,669 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:29:45,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 03:29:45,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 03:29:45,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:29:45,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 03:29:45,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:29:45,896 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 03:29:46,058 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 03:29:46,058 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 42 treesize of output 16 [2023-11-29 03:29:46,155 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 28 treesize of output 10 [2023-11-29 03:29:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 03:29:46,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:29:50,260 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (< 3 (select (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) (+ |c_ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 8)))) is different from false [2023-11-29 03:29:50,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378471351] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:29:50,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:29:50,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2023-11-29 03:29:50,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261295445] [2023-11-29 03:29:50,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:29:50,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 03:29:50,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:29:50,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 03:29:50,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=511, Unknown=1, NotChecked=46, Total=650 [2023-11-29 03:29:50,270 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-29 03:29:54,351 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 03:29:54,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:29:54,604 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2023-11-29 03:29:54,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 03:29:54,604 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 42 [2023-11-29 03:29:54,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:29:54,605 INFO L225 Difference]: With dead ends: 54 [2023-11-29 03:29:54,605 INFO L226 Difference]: Without dead ends: 52 [2023-11-29 03:29:54,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=212, Invalid=1051, Unknown=1, NotChecked=68, Total=1332 [2023-11-29 03:29:54,606 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:29:54,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 157 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 249 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-29 03:29:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-29 03:29:54,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2023-11-29 03:29:54,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 03:29:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-11-29 03:29:54,615 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 42 [2023-11-29 03:29:54,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:29:54,615 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-11-29 03:29:54,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 20 states have internal predecessors, (40), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-29 03:29:54,616 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-11-29 03:29:54,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 03:29:54,616 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:54,617 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:54,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 03:29:54,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:54,817 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:54,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:54,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1744123953, now seen corresponding path program 4 times [2023-11-29 03:29:54,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:54,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627997509] [2023-11-29 03:29:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:54,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:55,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:29:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:55,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:29:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:55,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:29:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:55,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:29:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:55,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:29:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 03:29:55,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:29:55,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627997509] [2023-11-29 03:29:55,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627997509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:29:55,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348160801] [2023-11-29 03:29:55,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:29:55,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:55,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:29:55,332 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:29:55,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 03:29:55,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:29:55,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:29:55,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 03:29:55,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:29:55,545 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 03:29:55,722 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 22 treesize of output 10 [2023-11-29 03:29:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 03:29:55,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:29:55,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:29:55,841 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 23 treesize of output 19 [2023-11-29 03:29:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 03:29:56,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348160801] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:29:56,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:29:56,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 31 [2023-11-29 03:29:56,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816770751] [2023-11-29 03:29:56,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:29:56,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 03:29:56,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:29:56,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 03:29:56,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2023-11-29 03:29:56,097 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 26 states have internal predecessors, (56), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2023-11-29 03:29:56,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:29:56,623 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2023-11-29 03:29:56,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 03:29:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 26 states have internal predecessors, (56), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) Word has length 45 [2023-11-29 03:29:56,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:29:56,625 INFO L225 Difference]: With dead ends: 66 [2023-11-29 03:29:56,625 INFO L226 Difference]: Without dead ends: 64 [2023-11-29 03:29:56,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=284, Invalid=1608, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 03:29:56,626 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 106 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:29:56,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 205 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:29:56,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-29 03:29:56,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2023-11-29 03:29:56,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 03:29:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2023-11-29 03:29:56,638 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 45 [2023-11-29 03:29:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:29:56,639 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2023-11-29 03:29:56,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 26 states have internal predecessors, (56), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2023-11-29 03:29:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2023-11-29 03:29:56,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 03:29:56,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:56,641 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:56,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 03:29:56,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:56,847 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:56,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:56,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1312062380, now seen corresponding path program 5 times [2023-11-29 03:29:56,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:56,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060999228] [2023-11-29 03:29:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:56,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:56,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:29:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:56,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:29:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:56,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:29:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:57,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:29:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:57,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:29:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 03:29:57,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:29:57,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060999228] [2023-11-29 03:29:57,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060999228] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:29:57,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900883601] [2023-11-29 03:29:57,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:29:57,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:57,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:29:57,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:29:57,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:29:57,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 03:29:57,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:29:57,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:29:57,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:29:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 03:29:57,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:29:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 03:29:57,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900883601] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:29:57,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:29:57,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 03:29:57,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376118958] [2023-11-29 03:29:57,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:29:57,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 03:29:57,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:29:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 03:29:57,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 03:29:57,324 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 03:29:57,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:29:57,464 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2023-11-29 03:29:57,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 03:29:57,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2023-11-29 03:29:57,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:29:57,466 INFO L225 Difference]: With dead ends: 70 [2023-11-29 03:29:57,466 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 03:29:57,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-11-29 03:29:57,468 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:29:57,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 131 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:29:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 03:29:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2023-11-29 03:29:57,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 03:29:57,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2023-11-29 03:29:57,479 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 48 [2023-11-29 03:29:57,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:29:57,479 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2023-11-29 03:29:57,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 03:29:57,480 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2023-11-29 03:29:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 03:29:57,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:29:57,481 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:29:57,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 03:29:57,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 03:29:57,684 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:29:57,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:29:57,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1159209714, now seen corresponding path program 6 times [2023-11-29 03:29:57,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:29:57,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992804774] [2023-11-29 03:29:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:29:57,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:29:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:58,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:29:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:58,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:29:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:58,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:29:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:58,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:29:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:58,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:29:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:58,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:29:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:29:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 03:29:58,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:29:58,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992804774] [2023-11-29 03:29:58,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992804774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:29:58,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546583552] [2023-11-29 03:29:58,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:29:58,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:29:58,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:29:58,124 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:29:58,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 03:29:58,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-29 03:29:58,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:29:58,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 03:29:58,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:29:58,371 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 03:29:58,523 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 03:29:58,523 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 42 treesize of output 16 [2023-11-29 03:29:58,643 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 28 treesize of output 10 [2023-11-29 03:29:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 03:29:58,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:10,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546583552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:10,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:30:10,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2023-11-29 03:30:10,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810954074] [2023-11-29 03:30:10,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:10,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 03:30:10,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:10,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 03:30:10,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=994, Unknown=3, NotChecked=0, Total=1122 [2023-11-29 03:30:10,881 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-29 03:30:15,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 03:30:19,072 WARN L539 Checker$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 03:30:19,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:19,654 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2023-11-29 03:30:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 03:30:19,655 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 52 [2023-11-29 03:30:19,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:19,656 INFO L225 Difference]: With dead ends: 56 [2023-11-29 03:30:19,656 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 03:30:19,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=380, Invalid=2373, Unknown=3, NotChecked=0, Total=2756 [2023-11-29 03:30:19,658 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 101 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 20 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:19,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 205 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 442 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2023-11-29 03:30:19,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 03:30:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2023-11-29 03:30:19,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 03:30:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2023-11-29 03:30:19,671 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 52 [2023-11-29 03:30:19,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:19,671 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2023-11-29 03:30:19,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-29 03:30:19,671 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2023-11-29 03:30:19,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 03:30:19,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:19,672 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:19,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 03:30:19,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 03:30:19,879 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:19,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:19,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1809836557, now seen corresponding path program 7 times [2023-11-29 03:30:19,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:19,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251031330] [2023-11-29 03:30:19,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:19,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:20,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:30:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:20,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:30:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:20,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:30:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:20,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:30:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:20,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:30:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:20,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:30:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 03:30:20,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:20,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251031330] [2023-11-29 03:30:20,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251031330] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:20,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758414576] [2023-11-29 03:30:20,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:30:20,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:20,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:20,335 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:20,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 03:30:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:20,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 03:30:20,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:20,675 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 03:30:20,892 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 22 treesize of output 10 [2023-11-29 03:30:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 03:30:20,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:21,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:30:21,009 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 23 treesize of output 19 [2023-11-29 03:30:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 03:30:21,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758414576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:21,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:21,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 31 [2023-11-29 03:30:21,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210695711] [2023-11-29 03:30:21,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:21,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 03:30:21,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:21,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 03:30:21,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2023-11-29 03:30:21,129 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 10 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-29 03:30:21,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:21,712 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2023-11-29 03:30:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 03:30:21,712 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 10 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 55 [2023-11-29 03:30:21,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:21,713 INFO L225 Difference]: With dead ends: 79 [2023-11-29 03:30:21,714 INFO L226 Difference]: Without dead ends: 77 [2023-11-29 03:30:21,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=294, Invalid=1868, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 03:30:21,715 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 114 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:21,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 290 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:30:21,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-29 03:30:21,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2023-11-29 03:30:21,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 03:30:21,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2023-11-29 03:30:21,729 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 55 [2023-11-29 03:30:21,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:21,730 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2023-11-29 03:30:21,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 10 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-29 03:30:21,730 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2023-11-29 03:30:21,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 03:30:21,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:21,731 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:21,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 03:30:21,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:21,934 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:21,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:21,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2110802094, now seen corresponding path program 8 times [2023-11-29 03:30:21,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:21,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252523327] [2023-11-29 03:30:21,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:21,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:22,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:30:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:22,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:30:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:22,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:30:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:22,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:30:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:22,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:30:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:22,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:30:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 03:30:22,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:22,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252523327] [2023-11-29 03:30:22,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252523327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:22,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57057234] [2023-11-29 03:30:22,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:30:22,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:22,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:22,109 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:22,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 03:30:22,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:30:22,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:30:22,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 03:30:22,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 03:30:22,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 03:30:22,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57057234] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:22,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:22,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-29 03:30:22,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870269862] [2023-11-29 03:30:22,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:22,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 03:30:22,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:22,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 03:30:22,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-29 03:30:22,417 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-29 03:30:22,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:22,523 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2023-11-29 03:30:22,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 03:30:22,523 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2023-11-29 03:30:22,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:22,524 INFO L225 Difference]: With dead ends: 83 [2023-11-29 03:30:22,524 INFO L226 Difference]: Without dead ends: 64 [2023-11-29 03:30:22,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-11-29 03:30:22,525 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:22,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 114 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:30:22,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-29 03:30:22,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2023-11-29 03:30:22,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 03:30:22,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-11-29 03:30:22,536 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 58 [2023-11-29 03:30:22,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:22,536 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-11-29 03:30:22,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-29 03:30:22,537 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-11-29 03:30:22,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 03:30:22,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:22,537 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:22,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 03:30:22,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:22,738 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:22,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:22,739 INFO L85 PathProgramCache]: Analyzing trace with hash 982598516, now seen corresponding path program 9 times [2023-11-29 03:30:22,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:22,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175280118] [2023-11-29 03:30:22,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:22,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:23,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:30:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:23,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:30:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:23,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:30:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:23,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:30:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:23,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:30:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:23,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:30:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:23,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:30:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 03:30:23,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:23,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175280118] [2023-11-29 03:30:23,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175280118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:23,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750662570] [2023-11-29 03:30:23,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:30:23,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:23,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:23,184 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:23,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 03:30:23,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-29 03:30:23,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:30:23,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 03:30:23,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:23,541 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 03:30:23,727 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 03:30:23,727 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 42 treesize of output 16 [2023-11-29 03:30:23,934 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 28 treesize of output 10 [2023-11-29 03:30:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 33 proven. 65 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 03:30:23,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:44,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750662570] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:44,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:30:44,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2023-11-29 03:30:44,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291085519] [2023-11-29 03:30:44,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:44,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 03:30:44,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:44,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 03:30:44,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=982, Unknown=5, NotChecked=0, Total=1122 [2023-11-29 03:30:44,237 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 28 states have internal predecessors, (60), 11 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-29 03:30:48,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 03:30:52,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 03:30:56,496 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 03:30:56,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:56,914 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2023-11-29 03:30:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 03:30:56,914 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 28 states have internal predecessors, (60), 11 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 62 [2023-11-29 03:30:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:56,915 INFO L225 Difference]: With dead ends: 66 [2023-11-29 03:30:56,915 INFO L226 Difference]: Without dead ends: 64 [2023-11-29 03:30:56,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=331, Invalid=2016, Unknown=5, NotChecked=0, Total=2352 [2023-11-29 03:30:56,917 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 80 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:56,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 263 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 541 Invalid, 3 Unknown, 0 Unchecked, 12.4s Time] [2023-11-29 03:30:56,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-29 03:30:56,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2023-11-29 03:30:56,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 03:30:56,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2023-11-29 03:30:56,927 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 62 [2023-11-29 03:30:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:56,927 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2023-11-29 03:30:56,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 28 states have internal predecessors, (60), 11 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-29 03:30:56,927 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2023-11-29 03:30:56,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 03:30:56,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:56,928 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:56,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 03:30:57,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:57,129 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:57,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:57,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1899098575, now seen corresponding path program 10 times [2023-11-29 03:30:57,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:57,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664033136] [2023-11-29 03:30:57,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:57,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:57,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:30:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:57,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:30:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:57,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:30:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:57,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:30:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:57,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:30:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:57,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:30:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:57,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:30:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 03:30:57,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:57,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664033136] [2023-11-29 03:30:57,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664033136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:57,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688177570] [2023-11-29 03:30:57,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:30:57,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:57,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:57,580 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:57,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 03:30:57,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:30:57,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:30:57,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 03:30:57,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:57,982 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 03:30:58,258 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 22 treesize of output 10 [2023-11-29 03:30:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 21 proven. 76 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 03:30:58,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:58,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:30:58,394 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 23 treesize of output 19 [2023-11-29 03:30:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 03:30:58,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688177570] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:58,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:58,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 18] total 35 [2023-11-29 03:30:58,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50902653] [2023-11-29 03:30:58,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:58,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 03:30:58,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:58,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 03:30:58,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 03:30:58,524 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 31 states have internal predecessors, (70), 12 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-29 03:30:59,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:59,218 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2023-11-29 03:30:59,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 03:30:59,219 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 31 states have internal predecessors, (70), 12 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 65 [2023-11-29 03:30:59,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:59,220 INFO L225 Difference]: With dead ends: 92 [2023-11-29 03:30:59,220 INFO L226 Difference]: Without dead ends: 90 [2023-11-29 03:30:59,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=349, Invalid=2513, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 03:30:59,222 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 143 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:59,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 299 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:30:59,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-29 03:30:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 65. [2023-11-29 03:30:59,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 03:30:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2023-11-29 03:30:59,234 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 65 [2023-11-29 03:30:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:59,235 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2023-11-29 03:30:59,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 31 states have internal predecessors, (70), 12 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-29 03:30:59,235 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2023-11-29 03:30:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 03:30:59,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:59,235 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:30:59,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 03:30:59,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:59,436 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:59,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:59,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1564143188, now seen corresponding path program 11 times [2023-11-29 03:30:59,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:59,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734792922] [2023-11-29 03:30:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:59,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:59,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:30:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:59,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:30:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:59,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:30:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:59,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:30:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:59,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:30:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:59,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:30:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:59,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:30:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-29 03:30:59,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:59,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734792922] [2023-11-29 03:30:59,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734792922] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:59,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138954697] [2023-11-29 03:30:59,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:30:59,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:59,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:59,624 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:59,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 03:30:59,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-29 03:30:59,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:30:59,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 03:30:59,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-29 03:30:59,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-29 03:31:00,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138954697] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:00,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:00,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-29 03:31:00,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260751270] [2023-11-29 03:31:00,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:00,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 03:31:00,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:00,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 03:31:00,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-29 03:31:00,033 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 03:31:00,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:31:00,196 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2023-11-29 03:31:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 03:31:00,197 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2023-11-29 03:31:00,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:31:00,198 INFO L225 Difference]: With dead ends: 96 [2023-11-29 03:31:00,198 INFO L226 Difference]: Without dead ends: 74 [2023-11-29 03:31:00,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 131 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-11-29 03:31:00,200 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 74 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:31:00,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 111 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:31:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-29 03:31:00,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2023-11-29 03:31:00,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 03:31:00,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2023-11-29 03:31:00,222 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 68 [2023-11-29 03:31:00,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:31:00,222 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2023-11-29 03:31:00,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 03:31:00,222 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2023-11-29 03:31:00,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-29 03:31:00,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:31:00,223 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:00,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 03:31:00,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:00,424 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:31:00,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:00,424 INFO L85 PathProgramCache]: Analyzing trace with hash -693563790, now seen corresponding path program 12 times [2023-11-29 03:31:00,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:00,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666332241] [2023-11-29 03:31:00,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:00,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:00,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:31:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:00,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:31:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:00,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:31:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:00,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:31:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:00,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:31:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:00,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:31:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:00,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:31:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:00,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:31:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 18 proven. 95 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-29 03:31:00,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:00,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666332241] [2023-11-29 03:31:00,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666332241] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:00,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988800485] [2023-11-29 03:31:00,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:31:00,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:00,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:00,987 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:00,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 03:31:01,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 03:31:01,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:31:01,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 03:31:01,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:01,337 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 03:31:01,504 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 03:31:01,504 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 42 treesize of output 16 [2023-11-29 03:31:01,765 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 28 treesize of output 10 [2023-11-29 03:31:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 37 proven. 104 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 03:31:01,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:05,909 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (< 6 (select (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) (+ |c_ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20)))) is different from false [2023-11-29 03:31:05,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988800485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:05,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:31:05,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2023-11-29 03:31:05,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791569729] [2023-11-29 03:31:05,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:05,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 03:31:05,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:05,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 03:31:05,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1189, Unknown=1, NotChecked=70, Total=1406 [2023-11-29 03:31:05,921 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 32 states have internal predecessors, (70), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2023-11-29 03:31:06,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:31:06,600 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2023-11-29 03:31:06,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 03:31:06,601 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 32 states have internal predecessors, (70), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 72 [2023-11-29 03:31:06,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:31:06,602 INFO L225 Difference]: With dead ends: 76 [2023-11-29 03:31:06,602 INFO L226 Difference]: Without dead ends: 74 [2023-11-29 03:31:06,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=368, Invalid=2497, Unknown=1, NotChecked=104, Total=2970 [2023-11-29 03:31:06,604 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:31:06,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 324 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:31:06,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-29 03:31:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2023-11-29 03:31:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 03:31:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2023-11-29 03:31:06,619 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 72 [2023-11-29 03:31:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:31:06,620 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2023-11-29 03:31:06,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 32 states have internal predecessors, (70), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2023-11-29 03:31:06,620 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2023-11-29 03:31:06,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-29 03:31:06,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:31:06,621 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:06,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 03:31:06,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 03:31:06,821 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:31:06,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1134393971, now seen corresponding path program 13 times [2023-11-29 03:31:06,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:06,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71658496] [2023-11-29 03:31:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:06,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:07,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:31:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:07,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:31:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:07,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:31:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:07,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:31:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:07,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:31:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:07,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:31:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:07,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:31:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:07,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:31:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 106 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-29 03:31:07,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:07,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71658496] [2023-11-29 03:31:07,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71658496] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:07,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403093233] [2023-11-29 03:31:07,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:31:07,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:07,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:07,454 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:07,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 03:31:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:07,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 03:31:07,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:07,884 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 03:31:08,195 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 22 treesize of output 10 [2023-11-29 03:31:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 106 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-29 03:31:08,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:08,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:31:08,339 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 23 treesize of output 19 [2023-11-29 03:31:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 106 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-29 03:31:08,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403093233] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:08,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:08,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20] total 47 [2023-11-29 03:31:08,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066985450] [2023-11-29 03:31:08,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:08,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 03:31:08,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:08,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 03:31:08,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 03:31:08,677 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 47 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 41 states have internal predecessors, (93), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (22), 22 states have call predecessors, (22), 20 states have call successors, (22) [2023-11-29 03:31:09,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:31:09,659 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2023-11-29 03:31:09,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 03:31:09,659 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 41 states have internal predecessors, (93), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (22), 22 states have call predecessors, (22), 20 states have call successors, (22) Word has length 75 [2023-11-29 03:31:09,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:31:09,660 INFO L225 Difference]: With dead ends: 105 [2023-11-29 03:31:09,661 INFO L226 Difference]: Without dead ends: 103 [2023-11-29 03:31:09,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 133 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=499, Invalid=4193, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 03:31:09,663 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 139 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:31:09,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 416 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 03:31:09,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-29 03:31:09,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2023-11-29 03:31:09,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-29 03:31:09,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2023-11-29 03:31:09,682 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 75 [2023-11-29 03:31:09,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:31:09,682 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2023-11-29 03:31:09,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 41 states have internal predecessors, (93), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (22), 22 states have call predecessors, (22), 20 states have call successors, (22) [2023-11-29 03:31:09,683 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2023-11-29 03:31:09,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-29 03:31:09,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:31:09,683 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:09,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 03:31:09,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:09,884 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:31:09,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:09,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1933705938, now seen corresponding path program 14 times [2023-11-29 03:31:09,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:09,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342161497] [2023-11-29 03:31:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:09,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:10,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:31:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:10,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:31:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:10,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:31:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:10,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:31:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:10,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:31:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:10,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:31:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:10,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:31:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:10,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:31:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 41 proven. 67 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-29 03:31:10,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:10,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342161497] [2023-11-29 03:31:10,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342161497] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:10,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969630413] [2023-11-29 03:31:10,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:31:10,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:10,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:10,132 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:10,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 03:31:10,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:31:10,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:31:10,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 03:31:10,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-29 03:31:10,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-29 03:31:10,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969630413] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:10,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:10,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-29 03:31:10,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762961995] [2023-11-29 03:31:10,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:10,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 03:31:10,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:10,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 03:31:10,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-29 03:31:10,569 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-29 03:31:10,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:31:10,757 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2023-11-29 03:31:10,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 03:31:10,758 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 78 [2023-11-29 03:31:10,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:31:10,759 INFO L225 Difference]: With dead ends: 109 [2023-11-29 03:31:10,759 INFO L226 Difference]: Without dead ends: 84 [2023-11-29 03:31:10,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 150 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 03:31:10,760 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:31:10,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 129 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:31:10,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-29 03:31:10,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2023-11-29 03:31:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-29 03:31:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2023-11-29 03:31:10,781 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 78 [2023-11-29 03:31:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:31:10,781 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2023-11-29 03:31:10,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-29 03:31:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2023-11-29 03:31:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-29 03:31:10,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:31:10,782 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:10,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 03:31:10,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 03:31:10,982 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:31:10,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:10,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2083922572, now seen corresponding path program 15 times [2023-11-29 03:31:10,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:10,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996232961] [2023-11-29 03:31:10,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:10,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:11,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:31:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:11,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:31:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:11,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:31:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:11,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:31:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:11,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:31:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:11,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:31:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:11,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:31:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:11,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:31:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:11,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:31:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-29 03:31:11,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:11,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996232961] [2023-11-29 03:31:11,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996232961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:11,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846878042] [2023-11-29 03:31:11,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:31:11,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:11,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:11,662 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:11,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 03:31:12,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-29 03:31:12,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:31:12,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 03:31:12,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:12,361 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 03:31:12,553 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 03:31:12,554 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 42 treesize of output 16 [2023-11-29 03:31:12,900 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 28 treesize of output 10 [2023-11-29 03:31:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 47 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-29 03:31:12,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:21,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846878042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:21,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:31:21,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 41 [2023-11-29 03:31:21,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343232791] [2023-11-29 03:31:21,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:21,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 03:31:21,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:21,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 03:31:21,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1626, Unknown=2, NotChecked=0, Total=1806 [2023-11-29 03:31:21,285 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 37 states have internal predecessors, (80), 15 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2023-11-29 03:31:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:31:22,183 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2023-11-29 03:31:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 03:31:22,183 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.0) internal successors, (80), 37 states have internal predecessors, (80), 15 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) Word has length 82 [2023-11-29 03:31:22,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:31:22,184 INFO L225 Difference]: With dead ends: 86 [2023-11-29 03:31:22,184 INFO L226 Difference]: Without dead ends: 84 [2023-11-29 03:31:22,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 96 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=448, Invalid=3332, Unknown=2, NotChecked=0, Total=3782 [2023-11-29 03:31:22,186 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 65 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:31:22,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 436 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 03:31:22,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-29 03:31:22,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2023-11-29 03:31:22,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-29 03:31:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2023-11-29 03:31:22,209 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 82 [2023-11-29 03:31:22,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:31:22,209 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2023-11-29 03:31:22,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.0) internal successors, (80), 37 states have internal predecessors, (80), 15 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2023-11-29 03:31:22,209 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2023-11-29 03:31:22,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-29 03:31:22,210 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:31:22,210 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:22,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 03:31:22,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:22,410 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:31:22,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:22,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1620522033, now seen corresponding path program 16 times [2023-11-29 03:31:22,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:22,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395475962] [2023-11-29 03:31:22,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:22,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:22,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:31:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:22,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:31:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:22,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:31:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:22,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:31:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:22,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:31:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:22,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:31:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:22,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:31:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:22,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:31:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:22,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:31:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 145 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-29 03:31:22,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:22,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395475962] [2023-11-29 03:31:22,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395475962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:22,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300277110] [2023-11-29 03:31:22,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:31:22,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:22,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:22,955 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:22,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 03:31:23,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:31:23,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:31:23,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 03:31:23,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:23,491 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 03:31:23,871 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 22 treesize of output 10 [2023-11-29 03:31:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 30 proven. 151 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 03:31:23,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:24,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:31:24,028 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 23 treesize of output 19 [2023-11-29 03:31:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 145 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-29 03:31:24,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300277110] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:24,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:24,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 22] total 43 [2023-11-29 03:31:24,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273959894] [2023-11-29 03:31:24,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:24,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 03:31:24,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 03:31:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1644, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 03:31:24,182 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 43 states, 42 states have (on average 2.142857142857143) internal successors, (90), 39 states have internal predecessors, (90), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2023-11-29 03:31:25,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:31:25,348 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2023-11-29 03:31:25,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 03:31:25,349 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.142857142857143) internal successors, (90), 39 states have internal predecessors, (90), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 85 [2023-11-29 03:31:25,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:31:25,350 INFO L225 Difference]: With dead ends: 118 [2023-11-29 03:31:25,350 INFO L226 Difference]: Without dead ends: 116 [2023-11-29 03:31:25,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 159 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=459, Invalid=4097, Unknown=0, NotChecked=0, Total=4556 [2023-11-29 03:31:25,353 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 162 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:31:25,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 508 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 03:31:25,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-29 03:31:25,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 85. [2023-11-29 03:31:25,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 03:31:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2023-11-29 03:31:25,381 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 85 [2023-11-29 03:31:25,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:31:25,381 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2023-11-29 03:31:25,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.142857142857143) internal successors, (90), 39 states have internal predecessors, (90), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2023-11-29 03:31:25,382 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2023-11-29 03:31:25,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-29 03:31:25,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:31:25,383 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:25,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 03:31:25,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:25,583 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:31:25,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:25,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1545078868, now seen corresponding path program 17 times [2023-11-29 03:31:25,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:25,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725364768] [2023-11-29 03:31:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:25,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:25,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:31:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:25,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:31:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:25,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:31:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:25,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:31:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:25,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:31:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:25,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:31:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:25,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:31:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:25,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:31:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:25,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:31:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 58 proven. 89 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-29 03:31:25,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:25,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725364768] [2023-11-29 03:31:25,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725364768] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:25,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627014627] [2023-11-29 03:31:25,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:31:25,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:25,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:25,842 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:25,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 03:31:25,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-29 03:31:25,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:31:25,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 03:31:25,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 77 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-29 03:31:26,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 77 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-29 03:31:26,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627014627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:26,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:26,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-29 03:31:26,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988127510] [2023-11-29 03:31:26,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:26,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 03:31:26,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:26,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 03:31:26,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-11-29 03:31:26,365 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-29 03:31:26,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:31:26,541 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2023-11-29 03:31:26,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 03:31:26,542 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 88 [2023-11-29 03:31:26,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:31:26,543 INFO L225 Difference]: With dead ends: 122 [2023-11-29 03:31:26,543 INFO L226 Difference]: Without dead ends: 94 [2023-11-29 03:31:26,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 169 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 03:31:26,544 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 80 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:31:26,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 145 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:31:26,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-29 03:31:26,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2023-11-29 03:31:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 03:31:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2023-11-29 03:31:26,561 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 88 [2023-11-29 03:31:26,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:31:26,561 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2023-11-29 03:31:26,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-29 03:31:26,562 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2023-11-29 03:31:26,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-29 03:31:26,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:31:26,562 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:26,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 03:31:26,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 03:31:26,763 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:31:26,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:26,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1606978034, now seen corresponding path program 18 times [2023-11-29 03:31:26,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:26,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857818208] [2023-11-29 03:31:26,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:26,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:27,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:31:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:27,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:31:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:27,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:31:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:27,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:31:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:27,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:31:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:27,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:31:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:27,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:31:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:27,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:31:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:27,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:31:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:27,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:31:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 173 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-29 03:31:27,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:27,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857818208] [2023-11-29 03:31:27,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857818208] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:27,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057286896] [2023-11-29 03:31:27,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:31:27,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:27,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:27,491 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:27,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 03:31:27,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-11-29 03:31:27,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:31:27,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-29 03:31:27,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:28,020 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 03:31:28,269 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 03:31:28,270 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 42 treesize of output 16 [2023-11-29 03:31:28,692 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 28 treesize of output 10 [2023-11-29 03:31:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 45 proven. 194 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 03:31:28,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:49,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057286896] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:49,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:31:49,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 44 [2023-11-29 03:31:49,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767943793] [2023-11-29 03:31:49,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:49,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 03:31:49,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:49,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 03:31:49,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1873, Unknown=5, NotChecked=0, Total=2070 [2023-11-29 03:31:49,066 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 40 states have internal predecessors, (90), 17 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (20), 19 states have call predecessors, (20), 17 states have call successors, (20) [2023-11-29 03:31:50,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:31:50,102 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2023-11-29 03:31:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 03:31:50,102 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 40 states have internal predecessors, (90), 17 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (20), 19 states have call predecessors, (20), 17 states have call successors, (20) Word has length 92 [2023-11-29 03:31:50,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:31:50,103 INFO L225 Difference]: With dead ends: 96 [2023-11-29 03:31:50,103 INFO L226 Difference]: Without dead ends: 94 [2023-11-29 03:31:50,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 108 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=496, Invalid=3921, Unknown=5, NotChecked=0, Total=4422 [2023-11-29 03:31:50,105 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:31:50,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 499 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 03:31:50,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-29 03:31:50,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2023-11-29 03:31:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 03:31:50,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2023-11-29 03:31:50,134 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 92 [2023-11-29 03:31:50,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:31:50,134 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2023-11-29 03:31:50,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 40 states have internal predecessors, (90), 17 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (20), 19 states have call predecessors, (20), 17 states have call successors, (20) [2023-11-29 03:31:50,134 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2023-11-29 03:31:50,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-29 03:31:50,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:31:50,135 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:50,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-29 03:31:50,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:50,336 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:31:50,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:50,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1782730483, now seen corresponding path program 19 times [2023-11-29 03:31:50,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:50,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866713770] [2023-11-29 03:31:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:50,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:50,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:31:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:50,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:31:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:50,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:31:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:50,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:31:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:50,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:31:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:50,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:31:50,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:50,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:31:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:50,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:31:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:50,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:31:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:50,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:31:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 27 proven. 190 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-29 03:31:50,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:50,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866713770] [2023-11-29 03:31:50,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866713770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:50,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180188225] [2023-11-29 03:31:50,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:31:50,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:50,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:50,965 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:50,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 03:31:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:51,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 03:31:51,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:51,548 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 03:31:52,019 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 22 treesize of output 10 [2023-11-29 03:31:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 27 proven. 190 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-29 03:31:52,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:52,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:31:52,223 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 23 treesize of output 19 [2023-11-29 03:31:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 27 proven. 190 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-29 03:31:52,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180188225] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:52,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:52,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 24] total 47 [2023-11-29 03:31:52,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749816846] [2023-11-29 03:31:52,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:52,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 03:31:52,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:52,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 03:31:52,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1983, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 03:31:52,382 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 43 states have internal predecessors, (100), 18 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-29 03:31:53,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:31:53,704 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2023-11-29 03:31:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 03:31:53,704 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 43 states have internal predecessors, (100), 18 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) Word has length 95 [2023-11-29 03:31:53,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:31:53,706 INFO L225 Difference]: With dead ends: 131 [2023-11-29 03:31:53,706 INFO L226 Difference]: Without dead ends: 129 [2023-11-29 03:31:53,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 178 SyntacticMatches, 9 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=514, Invalid=5036, Unknown=0, NotChecked=0, Total=5550 [2023-11-29 03:31:53,708 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 161 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:31:53,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 672 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 03:31:53,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-29 03:31:53,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2023-11-29 03:31:53,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-29 03:31:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2023-11-29 03:31:53,730 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 95 [2023-11-29 03:31:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:31:53,730 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2023-11-29 03:31:53,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 43 states have internal predecessors, (100), 18 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-29 03:31:53,731 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2023-11-29 03:31:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-29 03:31:53,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:31:53,731 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:53,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 03:31:53,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 03:31:53,932 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:31:53,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:53,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2058804818, now seen corresponding path program 20 times [2023-11-29 03:31:53,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:53,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732944556] [2023-11-29 03:31:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:53,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:54,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:31:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:54,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:31:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:54,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:31:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:54,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:31:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:54,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:31:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:54,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:31:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:54,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:31:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:54,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:31:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:54,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:31:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:54,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:31:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:54,225 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 78 proven. 114 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-29 03:31:54,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:54,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732944556] [2023-11-29 03:31:54,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732944556] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:54,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135305819] [2023-11-29 03:31:54,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:31:54,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:54,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:54,227 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:54,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 03:31:54,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:31:54,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:31:54,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 03:31:54,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 100 proven. 92 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-29 03:31:54,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 100 proven. 92 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-29 03:31:54,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135305819] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:54,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:54,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-11-29 03:31:54,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222739867] [2023-11-29 03:31:54,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:54,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 03:31:54,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:54,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 03:31:54,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-11-29 03:31:54,821 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-29 03:31:55,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:31:55,095 INFO L93 Difference]: Finished difference Result 135 states and 141 transitions. [2023-11-29 03:31:55,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 03:31:55,096 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 98 [2023-11-29 03:31:55,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:31:55,097 INFO L225 Difference]: With dead ends: 135 [2023-11-29 03:31:55,097 INFO L226 Difference]: Without dead ends: 104 [2023-11-29 03:31:55,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 188 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 03:31:55,098 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 82 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:31:55,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 119 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:31:55,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-29 03:31:55,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2023-11-29 03:31:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-29 03:31:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2023-11-29 03:31:55,120 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 98 [2023-11-29 03:31:55,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:31:55,120 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2023-11-29 03:31:55,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-29 03:31:55,121 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2023-11-29 03:31:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-29 03:31:55,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:31:55,121 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:55,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 03:31:55,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 03:31:55,322 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:31:55,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:55,323 INFO L85 PathProgramCache]: Analyzing trace with hash 267921268, now seen corresponding path program 21 times [2023-11-29 03:31:55,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:55,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450533540] [2023-11-29 03:31:55,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:55,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:56,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:31:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:56,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:31:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:56,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:31:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:56,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:31:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:56,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:31:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:56,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:31:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:56,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:31:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:56,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:31:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:56,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:31:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:56,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:31:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:56,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:31:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 27 proven. 221 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-11-29 03:31:56,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:56,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450533540] [2023-11-29 03:31:56,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450533540] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:56,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249284975] [2023-11-29 03:31:56,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:31:56,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:56,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:56,157 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:56,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 03:31:56,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 03:31:56,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:31:56,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 03:31:56,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:56,860 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 03:31:57,110 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 03:31:57,110 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 42 treesize of output 16 [2023-11-29 03:31:57,576 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 28 treesize of output 10 [2023-11-29 03:31:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 61 proven. 221 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-29 03:31:57,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:32:10,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249284975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:32:10,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:32:10,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 49 [2023-11-29 03:32:10,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389302748] [2023-11-29 03:32:10,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:32:10,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 03:32:10,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:10,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 03:32:10,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2331, Unknown=3, NotChecked=0, Total=2550 [2023-11-29 03:32:10,419 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 49 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 45 states have internal predecessors, (100), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2023-11-29 03:32:11,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:32:11,777 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2023-11-29 03:32:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 03:32:11,777 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 45 states have internal predecessors, (100), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) Word has length 102 [2023-11-29 03:32:11,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:32:11,778 INFO L225 Difference]: With dead ends: 106 [2023-11-29 03:32:11,778 INFO L226 Difference]: Without dead ends: 104 [2023-11-29 03:32:11,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=558, Invalid=4841, Unknown=3, NotChecked=0, Total=5402 [2023-11-29 03:32:11,780 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 104 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:32:11,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 601 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 03:32:11,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-29 03:32:11,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2023-11-29 03:32:11,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-29 03:32:11,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2023-11-29 03:32:11,816 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 102 [2023-11-29 03:32:11,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:32:11,817 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2023-11-29 03:32:11,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 45 states have internal predecessors, (100), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2023-11-29 03:32:11,817 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2023-11-29 03:32:11,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-29 03:32:11,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:32:11,818 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:11,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 03:32:12,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 03:32:12,018 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:32:12,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1598859825, now seen corresponding path program 22 times [2023-11-29 03:32:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:12,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672050209] [2023-11-29 03:32:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:12,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:12,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:32:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:12,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:32:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:12,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:32:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:12,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:32:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:12,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:32:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:12,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:32:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:12,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:32:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:12,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:32:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:12,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:32:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:12,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:32:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:12,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:32:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 30 proven. 241 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-11-29 03:32:12,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:12,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672050209] [2023-11-29 03:32:12,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672050209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:32:12,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104025536] [2023-11-29 03:32:12,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:32:12,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:32:12,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:32:12,793 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:32:12,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 03:32:12,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:32:12,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:32:12,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 03:32:12,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:32:13,527 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 03:32:14,071 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 22 treesize of output 10 [2023-11-29 03:32:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 45 proven. 244 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-29 03:32:14,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:32:14,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:32:14,339 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 23 treesize of output 19 [2023-11-29 03:32:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 30 proven. 241 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-11-29 03:32:14,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104025536] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:32:14,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:32:14,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 26] total 51 [2023-11-29 03:32:14,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228903939] [2023-11-29 03:32:14,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:32:14,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 03:32:14,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:14,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 03:32:14,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2354, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 03:32:14,534 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 51 states, 50 states have (on average 2.2) internal successors, (110), 47 states have internal predecessors, (110), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2023-11-29 03:32:16,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:32:16,424 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2023-11-29 03:32:16,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 03:32:16,425 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.2) internal successors, (110), 47 states have internal predecessors, (110), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) Word has length 105 [2023-11-29 03:32:16,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:32:16,427 INFO L225 Difference]: With dead ends: 144 [2023-11-29 03:32:16,427 INFO L226 Difference]: Without dead ends: 142 [2023-11-29 03:32:16,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 197 SyntacticMatches, 10 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=569, Invalid=6073, Unknown=0, NotChecked=0, Total=6642 [2023-11-29 03:32:16,428 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 144 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:32:16,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 753 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 03:32:16,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-29 03:32:16,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 105. [2023-11-29 03:32:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-29 03:32:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2023-11-29 03:32:16,461 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 105 [2023-11-29 03:32:16,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:32:16,462 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2023-11-29 03:32:16,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.2) internal successors, (110), 47 states have internal predecessors, (110), 20 states have call successors, (21), 1 states have call predecessors, (21), 2 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2023-11-29 03:32:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2023-11-29 03:32:16,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-29 03:32:16,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:32:16,463 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:16,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 03:32:16,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 03:32:16,663 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:32:16,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:16,664 INFO L85 PathProgramCache]: Analyzing trace with hash 451334740, now seen corresponding path program 23 times [2023-11-29 03:32:16,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:16,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283497709] [2023-11-29 03:32:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:16,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:17,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:32:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:17,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:32:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:17,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:32:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:17,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:32:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:17,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:32:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:17,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:32:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:17,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:32:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:17,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:32:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:17,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:32:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:17,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:32:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:17,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:32:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 101 proven. 142 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-29 03:32:17,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:17,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283497709] [2023-11-29 03:32:17,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283497709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:32:17,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734293675] [2023-11-29 03:32:17,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:32:17,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:32:17,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:32:17,022 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:32:17,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 03:32:17,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-29 03:32:17,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:32:17,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 03:32:17,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:32:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 126 proven. 117 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-29 03:32:17,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:32:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 126 proven. 117 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-29 03:32:17,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734293675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:32:17,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:32:17,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-11-29 03:32:17,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227048636] [2023-11-29 03:32:17,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:32:17,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 03:32:17,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:17,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 03:32:17,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 03:32:17,744 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 35 states have internal predecessors, (92), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-29 03:32:18,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:32:18,017 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2023-11-29 03:32:18,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 03:32:18,018 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 35 states have internal predecessors, (92), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 108 [2023-11-29 03:32:18,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:32:18,019 INFO L225 Difference]: With dead ends: 148 [2023-11-29 03:32:18,019 INFO L226 Difference]: Without dead ends: 114 [2023-11-29 03:32:18,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 207 SyntacticMatches, 19 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 03:32:18,020 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 86 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:32:18,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 162 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:32:18,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-29 03:32:18,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2023-11-29 03:32:18,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-29 03:32:18,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2023-11-29 03:32:18,055 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 108 [2023-11-29 03:32:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:32:18,055 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2023-11-29 03:32:18,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 35 states have internal predecessors, (92), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-29 03:32:18,055 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2023-11-29 03:32:18,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-29 03:32:18,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:32:18,056 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:18,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 03:32:18,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 03:32:18,257 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:32:18,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:18,257 INFO L85 PathProgramCache]: Analyzing trace with hash 617780594, now seen corresponding path program 24 times [2023-11-29 03:32:18,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:18,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131501628] [2023-11-29 03:32:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:18,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:19,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:32:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:19,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:32:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:19,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:32:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:19,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:32:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:19,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:32:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:19,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:32:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:19,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:32:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:19,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:32:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:19,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:32:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:19,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:32:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:19,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:32:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:19,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:32:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 30 proven. 275 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-29 03:32:19,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:19,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131501628] [2023-11-29 03:32:19,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131501628] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:32:19,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659638792] [2023-11-29 03:32:19,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:32:19,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:32:19,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:32:19,108 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:32:19,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 03:32:19,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-11-29 03:32:19,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:32:19,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-29 03:32:19,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:32:20,028 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 03:32:20,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:32:20,261 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 34 treesize of output 14 [2023-11-29 03:32:20,840 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 22 treesize of output 10 [2023-11-29 03:32:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 59 proven. 302 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-29 03:32:20,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:32:41,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659638792] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:32:41,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:32:41,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 53 [2023-11-29 03:32:41,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466246952] [2023-11-29 03:32:41,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:32:41,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 03:32:41,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:41,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 03:32:41,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2712, Unknown=4, NotChecked=0, Total=2970 [2023-11-29 03:32:41,247 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 53 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 49 states have internal predecessors, (111), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (24), 23 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 03:32:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:32:42,738 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2023-11-29 03:32:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 03:32:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 49 states have internal predecessors, (111), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (24), 23 states have call predecessors, (24), 22 states have call successors, (24) Word has length 112 [2023-11-29 03:32:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:32:42,739 INFO L225 Difference]: With dead ends: 116 [2023-11-29 03:32:42,739 INFO L226 Difference]: Without dead ends: 114 [2023-11-29 03:32:42,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 131 SyntacticMatches, 10 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=652, Invalid=5664, Unknown=4, NotChecked=0, Total=6320 [2023-11-29 03:32:42,740 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 127 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 03:32:42,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 651 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 03:32:42,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-29 03:32:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2023-11-29 03:32:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-29 03:32:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2023-11-29 03:32:42,768 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 112 [2023-11-29 03:32:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:32:42,768 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2023-11-29 03:32:42,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 49 states have internal predecessors, (111), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (24), 23 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 03:32:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2023-11-29 03:32:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-29 03:32:42,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:32:42,769 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:42,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 03:32:42,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 03:32:42,970 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:32:42,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:42,970 INFO L85 PathProgramCache]: Analyzing trace with hash 372413299, now seen corresponding path program 25 times [2023-11-29 03:32:42,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:42,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353223864] [2023-11-29 03:32:42,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:42,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:43,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:32:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:43,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:32:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:43,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:32:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:43,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:32:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:43,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:32:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:43,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:32:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:43,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:32:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:43,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:32:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:43,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:32:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:43,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:32:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:43,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:32:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:43,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:32:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 33 proven. 298 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-29 03:32:43,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:43,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353223864] [2023-11-29 03:32:43,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353223864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:32:43,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028595936] [2023-11-29 03:32:43,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:32:43,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:32:43,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:32:43,814 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:32:43,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 03:32:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:43,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 03:32:43,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:32:44,601 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 03:32:45,222 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 22 treesize of output 10 [2023-11-29 03:32:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 45 proven. 307 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2023-11-29 03:32:45,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:32:45,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:32:45,514 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 23 treesize of output 19 [2023-11-29 03:32:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 33 proven. 298 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-29 03:32:45,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028595936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:32:45,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:32:45,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 28] total 57 [2023-11-29 03:32:45,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297155217] [2023-11-29 03:32:45,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:32:45,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-29 03:32:45,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:45,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-29 03:32:45,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2970, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 03:32:45,724 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 57 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 52 states have internal predecessors, (122), 23 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) [2023-11-29 03:32:47,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:32:47,612 INFO L93 Difference]: Finished difference Result 157 states and 163 transitions. [2023-11-29 03:32:47,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 03:32:47,612 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 52 states have internal predecessors, (122), 23 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) Word has length 115 [2023-11-29 03:32:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:32:47,613 INFO L225 Difference]: With dead ends: 157 [2023-11-29 03:32:47,614 INFO L226 Difference]: Without dead ends: 155 [2023-11-29 03:32:47,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 215 SyntacticMatches, 11 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=636, Invalid=7554, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 03:32:47,615 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 190 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 2030 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 03:32:47,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 827 Invalid, 2088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2030 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 03:32:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-29 03:32:47,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 115. [2023-11-29 03:32:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 states have internal predecessors, (94), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 03:32:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2023-11-29 03:32:47,648 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 115 [2023-11-29 03:32:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:32:47,648 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2023-11-29 03:32:47,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 52 states have internal predecessors, (122), 23 states have call successors, (24), 1 states have call predecessors, (24), 2 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) [2023-11-29 03:32:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2023-11-29 03:32:47,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-29 03:32:47,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:32:47,649 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:47,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-29 03:32:47,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 03:32:47,850 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:32:47,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:47,850 INFO L85 PathProgramCache]: Analyzing trace with hash 669665746, now seen corresponding path program 26 times [2023-11-29 03:32:47,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:47,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665755730] [2023-11-29 03:32:47,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:47,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:48,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:32:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:48,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:32:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:48,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:32:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:48,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:32:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:48,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:32:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:48,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:32:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:48,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:32:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:48,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:32:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:48,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:32:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:48,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:32:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:48,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:32:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:48,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:32:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 127 proven. 173 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-29 03:32:48,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:48,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665755730] [2023-11-29 03:32:48,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665755730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:32:48,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272532679] [2023-11-29 03:32:48,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:32:48,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:32:48,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:32:48,216 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:32:48,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 03:32:48,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:32:48,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:32:48,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 03:32:48,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:32:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 155 proven. 145 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-29 03:32:48,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:32:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 155 proven. 145 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-29 03:32:48,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272532679] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:32:48,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:32:48,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-11-29 03:32:48,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113975496] [2023-11-29 03:32:48,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:32:48,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 03:32:48,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:48,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 03:32:48,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 03:32:48,929 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-29 03:32:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:32:49,223 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2023-11-29 03:32:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 03:32:49,223 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 118 [2023-11-29 03:32:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:32:49,225 INFO L225 Difference]: With dead ends: 161 [2023-11-29 03:32:49,225 INFO L226 Difference]: Without dead ends: 124 [2023-11-29 03:32:49,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 226 SyntacticMatches, 21 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 03:32:49,226 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 90 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:32:49,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 168 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:32:49,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-29 03:32:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 111. [2023-11-29 03:32:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 03:32:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2023-11-29 03:32:49,256 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 118 [2023-11-29 03:32:49,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:32:49,256 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2023-11-29 03:32:49,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-29 03:32:49,257 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2023-11-29 03:32:49,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-29 03:32:49,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:32:49,257 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:49,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 03:32:49,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:32:49,458 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:32:49,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:49,458 INFO L85 PathProgramCache]: Analyzing trace with hash 933241204, now seen corresponding path program 27 times [2023-11-29 03:32:49,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:49,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341477884] [2023-11-29 03:32:49,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:49,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:50,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:32:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:50,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:32:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:50,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:32:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:50,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:32:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:50,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:32:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:50,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:32:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:50,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:32:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:50,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:32:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:50,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:32:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:50,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:32:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:50,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:32:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:50,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:32:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:50,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:32:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 33 proven. 335 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-11-29 03:32:50,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:50,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341477884] [2023-11-29 03:32:50,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341477884] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:32:50,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856740962] [2023-11-29 03:32:50,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:32:50,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:32:50,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:32:50,751 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:32:50,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 03:32:51,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-11-29 03:32:51,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:32:51,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 03:32:51,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:32:52,065 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 03:32:52,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:32:52,261 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 34 treesize of output 14 [2023-11-29 03:32:52,929 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 22 treesize of output 10 [2023-11-29 03:32:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 75 proven. 335 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-29 03:32:52,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:33:17,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856740962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:33:17,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:33:17,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 57 [2023-11-29 03:33:17,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296664088] [2023-11-29 03:33:17,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:33:17,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-29 03:33:17,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:33:17,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-29 03:33:17,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=3142, Unknown=5, NotChecked=0, Total=3422 [2023-11-29 03:33:17,417 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 57 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 53 states have internal predecessors, (121), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2023-11-29 03:33:19,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:33:19,197 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2023-11-29 03:33:19,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 03:33:19,197 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 53 states have internal predecessors, (121), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) Word has length 122 [2023-11-29 03:33:19,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:33:19,198 INFO L225 Difference]: With dead ends: 126 [2023-11-29 03:33:19,198 INFO L226 Difference]: Without dead ends: 124 [2023-11-29 03:33:19,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 143 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=711, Invalid=6594, Unknown=5, NotChecked=0, Total=7310 [2023-11-29 03:33:19,200 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 124 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 2033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:33:19,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 830 Invalid, 2033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 03:33:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-29 03:33:19,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2023-11-29 03:33:19,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 03:33:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2023-11-29 03:33:19,233 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 122 [2023-11-29 03:33:19,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:33:19,233 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2023-11-29 03:33:19,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 53 states have internal predecessors, (121), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2023-11-29 03:33:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2023-11-29 03:33:19,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-29 03:33:19,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:33:19,234 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:33:19,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 03:33:19,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:33:19,435 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:33:19,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:33:19,435 INFO L85 PathProgramCache]: Analyzing trace with hash 871002161, now seen corresponding path program 28 times [2023-11-29 03:33:19,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:33:19,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840423489] [2023-11-29 03:33:19,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:33:19,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:33:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:20,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:33:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:20,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:33:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:20,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:33:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:20,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:33:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:20,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:33:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:20,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:33:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:20,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:33:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:20,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:33:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:20,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:33:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:20,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:33:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:20,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:33:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:20,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:33:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:20,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:33:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 36 proven. 361 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-11-29 03:33:20,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:33:20,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840423489] [2023-11-29 03:33:20,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840423489] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:33:20,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440644608] [2023-11-29 03:33:20,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:33:20,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:33:20,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:33:20,431 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:33:20,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 03:33:20,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:33:20,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:33:20,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-29 03:33:20,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:33:21,308 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 03:33:22,073 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 22 treesize of output 10 [2023-11-29 03:33:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 48 proven. 373 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-29 03:33:22,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:33:22,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:33:22,376 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 23 treesize of output 19 [2023-11-29 03:33:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 36 proven. 361 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-11-29 03:33:22,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440644608] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:33:22,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:33:22,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 30] total 59 [2023-11-29 03:33:22,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526000443] [2023-11-29 03:33:22,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:33:22,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-29 03:33:22,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:33:22,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-29 03:33:22,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3192, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 03:33:22,582 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 59 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 55 states have internal predecessors, (130), 24 states have call successors, (25), 1 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2023-11-29 03:33:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:33:24,771 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2023-11-29 03:33:24,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-29 03:33:24,771 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 55 states have internal predecessors, (130), 24 states have call successors, (25), 1 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) Word has length 125 [2023-11-29 03:33:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:33:24,773 INFO L225 Difference]: With dead ends: 170 [2023-11-29 03:33:24,773 INFO L226 Difference]: Without dead ends: 168 [2023-11-29 03:33:24,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 235 SyntacticMatches, 12 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2657 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=679, Invalid=8441, Unknown=0, NotChecked=0, Total=9120 [2023-11-29 03:33:24,774 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 187 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 2665 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 2730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:33:24,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1018 Invalid, 2730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2665 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 03:33:24,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-29 03:33:24,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2023-11-29 03:33:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-29 03:33:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 130 transitions. [2023-11-29 03:33:24,810 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 130 transitions. Word has length 125 [2023-11-29 03:33:24,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:33:24,810 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 130 transitions. [2023-11-29 03:33:24,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 55 states have internal predecessors, (130), 24 states have call successors, (25), 1 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2023-11-29 03:33:24,811 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 130 transitions. [2023-11-29 03:33:24,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-29 03:33:24,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:33:24,811 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:33:24,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 03:33:25,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:33:25,012 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:33:25,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:33:25,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2133544020, now seen corresponding path program 29 times [2023-11-29 03:33:25,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:33:25,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517723112] [2023-11-29 03:33:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:33:25,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:33:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:25,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:33:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:25,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:33:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:25,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:33:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:25,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:33:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:25,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:33:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:25,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:33:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:25,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:33:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:25,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:33:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:25,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:33:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:25,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:33:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:25,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:33:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:25,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:33:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:25,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:33:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 156 proven. 207 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 03:33:25,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:33:25,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517723112] [2023-11-29 03:33:25,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517723112] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:33:25,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982458336] [2023-11-29 03:33:25,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:33:25,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:33:25,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:33:25,463 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:33:25,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 03:33:25,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-29 03:33:25,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:33:25,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 03:33:25,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:33:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 187 proven. 176 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 03:33:26,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:33:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 187 proven. 176 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 03:33:26,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982458336] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:33:26,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:33:26,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-11-29 03:33:26,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98987167] [2023-11-29 03:33:26,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:33:26,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 03:33:26,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:33:26,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 03:33:26,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 03:33:26,355 INFO L87 Difference]: Start difference. First operand 125 states and 130 transitions. Second operand has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-11-29 03:33:26,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:33:26,689 INFO L93 Difference]: Finished difference Result 174 states and 180 transitions. [2023-11-29 03:33:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 03:33:26,689 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 128 [2023-11-29 03:33:26,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:33:26,691 INFO L225 Difference]: With dead ends: 174 [2023-11-29 03:33:26,691 INFO L226 Difference]: Without dead ends: 134 [2023-11-29 03:33:26,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 245 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 03:33:26,692 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 90 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:33:26,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 218 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:33:26,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-29 03:33:26,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2023-11-29 03:33:26,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-29 03:33:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2023-11-29 03:33:26,747 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 128 [2023-11-29 03:33:26,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:33:26,748 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2023-11-29 03:33:26,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-11-29 03:33:26,748 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2023-11-29 03:33:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-29 03:33:26,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:33:26,749 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:33:26,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 03:33:26,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 03:33:26,949 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:33:26,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:33:26,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1591529230, now seen corresponding path program 30 times [2023-11-29 03:33:26,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:33:26,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306587598] [2023-11-29 03:33:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:33:26,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:33:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:27,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:33:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:27,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:33:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:28,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:33:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:28,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:33:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:28,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:33:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:28,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:33:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:28,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:33:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:28,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:33:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:28,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:33:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:28,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:33:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:28,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:33:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:28,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:33:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:28,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:33:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:28,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:33:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 36 proven. 401 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2023-11-29 03:33:28,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:33:28,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306587598] [2023-11-29 03:33:28,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306587598] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:33:28,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517664518] [2023-11-29 03:33:28,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:33:28,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:33:28,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:33:28,034 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:33:28,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 03:33:28,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-11-29 03:33:28,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:33:28,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-29 03:33:28,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:33:29,303 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 03:33:29,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:33:29,546 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 34 treesize of output 14 [2023-11-29 03:33:30,279 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 22 treesize of output 10 [2023-11-29 03:33:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 85 proven. 422 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-29 03:33:30,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:33:54,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517664518] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:33:54,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:33:54,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 61 [2023-11-29 03:33:54,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629206754] [2023-11-29 03:33:54,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:33:54,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-29 03:33:54,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:33:54,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-29 03:33:54,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=3604, Unknown=6, NotChecked=0, Total=3906 [2023-11-29 03:33:54,816 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 61 states, 60 states have (on average 2.183333333333333) internal successors, (131), 57 states have internal predecessors, (131), 26 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 27 states have call predecessors, (27), 26 states have call successors, (27) [2023-11-29 03:33:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:33:56,805 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2023-11-29 03:33:56,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 03:33:56,806 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 2.183333333333333) internal successors, (131), 57 states have internal predecessors, (131), 26 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 27 states have call predecessors, (27), 26 states have call successors, (27) Word has length 132 [2023-11-29 03:33:56,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:33:56,807 INFO L225 Difference]: With dead ends: 136 [2023-11-29 03:33:56,807 INFO L226 Difference]: Without dead ends: 134 [2023-11-29 03:33:56,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 155 SyntacticMatches, 12 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=770, Invalid=7596, Unknown=6, NotChecked=0, Total=8372 [2023-11-29 03:33:56,808 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 111 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 2386 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:33:56,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 958 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2386 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 03:33:56,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-29 03:33:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2023-11-29 03:33:56,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-29 03:33:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2023-11-29 03:33:56,849 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 132 [2023-11-29 03:33:56,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:33:56,850 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2023-11-29 03:33:56,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 2.183333333333333) internal successors, (131), 57 states have internal predecessors, (131), 26 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 27 states have call predecessors, (27), 26 states have call successors, (27) [2023-11-29 03:33:56,850 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2023-11-29 03:33:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-29 03:33:56,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:33:56,851 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:33:56,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 03:33:57,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:33:57,052 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:33:57,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:33:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1097709581, now seen corresponding path program 31 times [2023-11-29 03:33:57,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:33:57,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596933181] [2023-11-29 03:33:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:33:57,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:33:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:33:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:33:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:33:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:33:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:33:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:33:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:33:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:33:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:33:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:33:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:33:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:33:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:33:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:33:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 39 proven. 430 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2023-11-29 03:33:58,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:33:58,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596933181] [2023-11-29 03:33:58,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596933181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:33:58,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193724670] [2023-11-29 03:33:58,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:33:58,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:33:58,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:33:58,295 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:33:58,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 03:33:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:58,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-29 03:33:58,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:33:59,116 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 03:33:59,921 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 22 treesize of output 10 [2023-11-29 03:33:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 45 proven. 451 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-11-29 03:33:59,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:34:00,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:34:00,556 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 23 treesize of output 19 [2023-11-29 03:34:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 39 proven. 430 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2023-11-29 03:34:01,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193724670] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:34:01,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:34:01,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 32] total 89 [2023-11-29 03:34:01,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337621059] [2023-11-29 03:34:01,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:34:01,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-11-29 03:34:01,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:34:01,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-11-29 03:34:01,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=7381, Unknown=0, NotChecked=0, Total=7832 [2023-11-29 03:34:01,358 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand has 89 states, 88 states have (on average 2.2386363636363638) internal successors, (197), 83 states have internal predecessors, (197), 38 states have call successors, (39), 1 states have call predecessors, (39), 2 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) [2023-11-29 03:34:04,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:34:04,614 INFO L93 Difference]: Finished difference Result 183 states and 189 transitions. [2023-11-29 03:34:04,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 03:34:04,615 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 2.2386363636363638) internal successors, (197), 83 states have internal predecessors, (197), 38 states have call successors, (39), 1 states have call predecessors, (39), 2 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) Word has length 135 [2023-11-29 03:34:04,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:34:04,616 INFO L225 Difference]: With dead ends: 183 [2023-11-29 03:34:04,616 INFO L226 Difference]: Without dead ends: 181 [2023-11-29 03:34:04,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4818 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1061, Invalid=15451, Unknown=0, NotChecked=0, Total=16512 [2023-11-29 03:34:04,617 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 260 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 3668 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 3737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:34:04,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 1240 Invalid, 3737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3668 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 03:34:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-29 03:34:04,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 135. [2023-11-29 03:34:04,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 03:34:04,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2023-11-29 03:34:04,668 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 135 [2023-11-29 03:34:04,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:34:04,668 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2023-11-29 03:34:04,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 2.2386363636363638) internal successors, (197), 83 states have internal predecessors, (197), 38 states have call successors, (39), 1 states have call predecessors, (39), 2 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) [2023-11-29 03:34:04,669 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2023-11-29 03:34:04,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-29 03:34:04,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:34:04,669 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:34:04,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 03:34:04,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:04,871 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:34:04,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:34:04,872 INFO L85 PathProgramCache]: Analyzing trace with hash 20464978, now seen corresponding path program 32 times [2023-11-29 03:34:04,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:34:04,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732997466] [2023-11-29 03:34:04,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:34:04,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:34:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:05,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:34:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:05,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:34:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:05,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:34:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:05,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:34:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:05,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:34:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:05,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:34:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:05,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:34:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:05,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:34:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:05,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:34:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:05,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:34:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:05,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:34:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:05,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:34:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:05,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:34:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:05,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:34:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 188 proven. 244 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-11-29 03:34:05,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:34:05,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732997466] [2023-11-29 03:34:05,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732997466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:34:05,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131590796] [2023-11-29 03:34:05,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:34:05,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:05,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:34:05,412 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:34:05,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 03:34:05,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:34:05,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:34:05,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 03:34:05,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:34:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 222 proven. 210 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-11-29 03:34:05,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:34:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 222 proven. 210 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-11-29 03:34:06,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131590796] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:34:06,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:34:06,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2023-11-29 03:34:06,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048536457] [2023-11-29 03:34:06,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:34:06,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 03:34:06,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:34:06,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 03:34:06,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 03:34:06,306 INFO L87 Difference]: Start difference. First operand 135 states and 140 transitions. Second operand has 44 states, 44 states have (on average 2.6363636363636362) internal successors, (116), 44 states have internal predecessors, (116), 14 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2023-11-29 03:34:06,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:34:06,670 INFO L93 Difference]: Finished difference Result 187 states and 193 transitions. [2023-11-29 03:34:06,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 03:34:06,670 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.6363636363636362) internal successors, (116), 44 states have internal predecessors, (116), 14 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 138 [2023-11-29 03:34:06,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:34:06,671 INFO L225 Difference]: With dead ends: 187 [2023-11-29 03:34:06,671 INFO L226 Difference]: Without dead ends: 144 [2023-11-29 03:34:06,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 264 SyntacticMatches, 25 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 03:34:06,672 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 114 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:34:06,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 200 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:34:06,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-29 03:34:06,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 131. [2023-11-29 03:34:06,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 03:34:06,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2023-11-29 03:34:06,729 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 138 [2023-11-29 03:34:06,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:34:06,729 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2023-11-29 03:34:06,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.6363636363636362) internal successors, (116), 44 states have internal predecessors, (116), 14 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2023-11-29 03:34:06,729 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2023-11-29 03:34:06,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-29 03:34:06,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:34:06,730 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:34:06,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 03:34:06,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:06,932 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:34:06,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:34:06,933 INFO L85 PathProgramCache]: Analyzing trace with hash -867841164, now seen corresponding path program 33 times [2023-11-29 03:34:06,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:34:06,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746418812] [2023-11-29 03:34:06,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:34:06,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:34:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:08,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:34:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:08,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:34:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:08,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:34:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:08,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:34:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:08,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:34:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:08,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:34:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:08,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:34:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:08,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:34:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:08,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:34:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:08,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:34:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:08,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:34:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:08,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:34:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:08,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:34:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:08,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:34:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:08,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:34:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 39 proven. 473 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-11-29 03:34:08,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:34:08,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746418812] [2023-11-29 03:34:08,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746418812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:34:08,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523193721] [2023-11-29 03:34:08,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:34:08,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:08,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:34:08,329 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:34:08,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 03:34:09,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-11-29 03:34:09,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:34:09,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-29 03:34:09,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:34:09,410 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 03:34:09,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:34:09,599 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 34 treesize of output 14 [2023-11-29 03:34:10,278 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 22 treesize of output 10 [2023-11-29 03:34:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 89 proven. 473 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2023-11-29 03:34:10,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:34:22,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523193721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:34:22,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:34:22,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2023-11-29 03:34:22,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587781350] [2023-11-29 03:34:22,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:34:22,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-29 03:34:22,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:34:22,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-29 03:34:22,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=3948, Unknown=3, NotChecked=0, Total=4290 [2023-11-29 03:34:22,934 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 52 states, 51 states have (on average 2.2745098039215685) internal successors, (116), 49 states have internal predecessors, (116), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2023-11-29 03:34:25,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:34:25,279 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2023-11-29 03:34:25,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 03:34:25,279 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.2745098039215685) internal successors, (116), 49 states have internal predecessors, (116), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 142 [2023-11-29 03:34:25,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:34:25,281 INFO L225 Difference]: With dead ends: 146 [2023-11-29 03:34:25,281 INFO L226 Difference]: Without dead ends: 144 [2023-11-29 03:34:25,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2561 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=849, Invalid=8460, Unknown=3, NotChecked=0, Total=9312 [2023-11-29 03:34:25,282 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 140 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:34:25,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 557 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 03:34:25,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-29 03:34:25,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2023-11-29 03:34:25,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 03:34:25,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2023-11-29 03:34:25,333 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 142 [2023-11-29 03:34:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:34:25,333 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2023-11-29 03:34:25,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.2745098039215685) internal successors, (116), 49 states have internal predecessors, (116), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2023-11-29 03:34:25,333 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2023-11-29 03:34:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-29 03:34:25,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:34:25,334 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:34:25,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 03:34:25,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:25,535 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:34:25,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:34:25,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1852606001, now seen corresponding path program 34 times [2023-11-29 03:34:25,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:34:25,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811714614] [2023-11-29 03:34:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:34:25,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:34:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:34:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:34:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:34:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:34:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:34:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:34:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:34:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:34:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:34:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:34:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:34:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:34:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:34:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:34:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:34:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 42 proven. 505 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-11-29 03:34:26,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:34:26,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811714614] [2023-11-29 03:34:26,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811714614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:34:26,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144148773] [2023-11-29 03:34:26,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:34:26,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:26,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:34:26,829 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:34:26,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 03:34:26,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:34:26,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:34:26,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-29 03:34:27,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:34:27,929 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 03:34:28,838 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 22 treesize of output 10 [2023-11-29 03:34:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 51 proven. 526 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 03:34:28,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:34:29,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:34:29,219 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 23 treesize of output 19 [2023-11-29 03:34:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 42 proven. 505 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-11-29 03:34:29,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144148773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:34:29,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:34:29,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 34] total 67 [2023-11-29 03:34:29,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224011843] [2023-11-29 03:34:29,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:34:29,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-11-29 03:34:29,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:34:29,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-11-29 03:34:29,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=4158, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 03:34:29,454 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 67 states, 66 states have (on average 2.272727272727273) internal successors, (150), 63 states have internal predecessors, (150), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2023-11-29 03:34:32,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:34:32,517 INFO L93 Difference]: Finished difference Result 196 states and 202 transitions. [2023-11-29 03:34:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-29 03:34:32,518 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.272727272727273) internal successors, (150), 63 states have internal predecessors, (150), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) Word has length 145 [2023-11-29 03:34:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:34:32,519 INFO L225 Difference]: With dead ends: 196 [2023-11-29 03:34:32,519 INFO L226 Difference]: Without dead ends: 194 [2023-11-29 03:34:32,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 273 SyntacticMatches, 14 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=789, Invalid=11201, Unknown=0, NotChecked=0, Total=11990 [2023-11-29 03:34:32,521 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 200 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 3092 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 3164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 3092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:34:32,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1102 Invalid, 3164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 3092 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 03:34:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-29 03:34:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 145. [2023-11-29 03:34:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 16 states have call successors, (16), 13 states have call predecessors, (16), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 03:34:32,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 150 transitions. [2023-11-29 03:34:32,595 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 150 transitions. Word has length 145 [2023-11-29 03:34:32,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:34:32,596 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 150 transitions. [2023-11-29 03:34:32,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.272727272727273) internal successors, (150), 63 states have internal predecessors, (150), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2023-11-29 03:34:32,596 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 150 transitions. [2023-11-29 03:34:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-29 03:34:32,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:34:32,597 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:34:32,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 03:34:32,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:32,797 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:34:32,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:34:32,798 INFO L85 PathProgramCache]: Analyzing trace with hash 661222996, now seen corresponding path program 35 times [2023-11-29 03:34:32,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:34:32,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340816742] [2023-11-29 03:34:32,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:34:32,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:34:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:33,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:34:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:33,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:34:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:33,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:34:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:33,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:34:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:33,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:34:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:33,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:34:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:33,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:34:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:33,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:34:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:33,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:34:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:33,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:34:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:33,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:34:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:33,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:34:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:33,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:34:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:33,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:34:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:33,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:34:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 223 proven. 284 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-29 03:34:33,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:34:33,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340816742] [2023-11-29 03:34:33,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340816742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:34:33,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521881578] [2023-11-29 03:34:33,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:34:33,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:33,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:34:33,489 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:34:33,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 03:34:33,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-11-29 03:34:33,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:34:33,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 03:34:33,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:34:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 260 proven. 247 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-29 03:34:34,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:34:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 260 proven. 247 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-29 03:34:34,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521881578] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:34:34,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:34:34,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-11-29 03:34:34,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741767019] [2023-11-29 03:34:34,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:34:34,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 03:34:34,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:34:34,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 03:34:34,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 03:34:34,663 INFO L87 Difference]: Start difference. First operand 145 states and 150 transitions. Second operand has 47 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 47 states have internal predecessors, (124), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-11-29 03:34:35,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:34:35,087 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2023-11-29 03:34:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 03:34:35,087 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 47 states have internal predecessors, (124), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 148 [2023-11-29 03:34:35,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:34:35,089 INFO L225 Difference]: With dead ends: 200 [2023-11-29 03:34:35,089 INFO L226 Difference]: Without dead ends: 154 [2023-11-29 03:34:35,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 283 SyntacticMatches, 27 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 03:34:35,090 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 126 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:34:35,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 196 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:34:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-29 03:34:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 141. [2023-11-29 03:34:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 16 states have call successors, (16), 13 states have call predecessors, (16), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 03:34:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2023-11-29 03:34:35,151 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 148 [2023-11-29 03:34:35,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:34:35,152 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2023-11-29 03:34:35,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 47 states have internal predecessors, (124), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-11-29 03:34:35,152 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2023-11-29 03:34:35,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-29 03:34:35,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:34:35,153 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:34:35,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 03:34:35,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:35,353 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:34:35,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:34:35,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1192647794, now seen corresponding path program 36 times [2023-11-29 03:34:35,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:34:35,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927976782] [2023-11-29 03:34:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:34:35,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:34:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:34:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:34:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:34:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:34:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:34:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:34:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:34:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:34:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:34:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:34:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:34:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:34:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:34:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:34:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:34:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:34:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 42 proven. 551 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-29 03:34:36,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:34:36,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927976782] [2023-11-29 03:34:36,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927976782] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:34:36,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140063859] [2023-11-29 03:34:36,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:34:36,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:36,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:34:36,783 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:34:36,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 03:34:37,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2023-11-29 03:34:37,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:34:37,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-29 03:34:37,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:34:38,555 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 03:34:38,821 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 30 treesize of output 14 [2023-11-29 03:34:39,945 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 22 treesize of output 10 [2023-11-29 03:34:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 99 proven. 578 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-29 03:34:39,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:34:44,398 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (< 14 (select (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) (+ |c_ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 52)))) is different from false [2023-11-29 03:34:44,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140063859] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:34:44,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:34:44,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37] total 69 [2023-11-29 03:34:44,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167933673] [2023-11-29 03:34:44,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:34:44,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-11-29 03:34:44,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:34:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-11-29 03:34:44,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=4533, Unknown=1, NotChecked=136, Total=4970 [2023-11-29 03:34:44,411 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand has 69 states, 68 states have (on average 2.2205882352941178) internal successors, (151), 65 states have internal predecessors, (151), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2023-11-29 03:34:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:34:48,831 INFO L93 Difference]: Finished difference Result 215 states and 224 transitions. [2023-11-29 03:34:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-11-29 03:34:48,831 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.2205882352941178) internal successors, (151), 65 states have internal predecessors, (151), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) Word has length 152 [2023-11-29 03:34:48,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:34:48,833 INFO L225 Difference]: With dead ends: 215 [2023-11-29 03:34:48,833 INFO L226 Difference]: Without dead ends: 213 [2023-11-29 03:34:48,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 179 SyntacticMatches, 14 SemanticMatches, 134 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5929 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1470, Invalid=16623, Unknown=1, NotChecked=266, Total=18360 [2023-11-29 03:34:48,836 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 399 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 3270 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 3414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 03:34:48,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 1393 Invalid, 3414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 3270 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 03:34:48,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-29 03:34:48,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 155. [2023-11-29 03:34:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 121 states have (on average 1.0330578512396693) internal successors, (125), 122 states have internal predecessors, (125), 19 states have call successors, (19), 14 states have call predecessors, (19), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-29 03:34:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 163 transitions. [2023-11-29 03:34:48,942 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 163 transitions. Word has length 152 [2023-11-29 03:34:48,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:34:48,943 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 163 transitions. [2023-11-29 03:34:48,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.2205882352941178) internal successors, (151), 65 states have internal predecessors, (151), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2023-11-29 03:34:48,943 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 163 transitions. [2023-11-29 03:34:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-29 03:34:48,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:34:48,944 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:34:48,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-29 03:34:49,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:49,145 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:34:49,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:34:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2088407949, now seen corresponding path program 37 times [2023-11-29 03:34:49,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:34:49,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775541928] [2023-11-29 03:34:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:34:49,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:34:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:34:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:34:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:34:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:34:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:34:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:34:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:34:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:34:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:34:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:34:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:34:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:34:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:34:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:34:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:34:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:34:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 45 proven. 586 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-29 03:34:50,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:34:50,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775541928] [2023-11-29 03:34:50,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775541928] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:34:50,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239809890] [2023-11-29 03:34:50,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:34:50,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:50,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:34:50,430 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:34:50,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 03:34:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:50,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-29 03:34:50,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:34:51,596 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 03:34:52,629 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 22 treesize of output 10 [2023-11-29 03:34:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 63 proven. 601 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2023-11-29 03:34:52,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:34:53,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:34:53,121 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 23 treesize of output 19 [2023-11-29 03:34:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 45 proven. 586 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-29 03:34:53,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239809890] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:34:53,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:34:53,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 36] total 71 [2023-11-29 03:34:53,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992305262] [2023-11-29 03:34:53,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:34:53,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-29 03:34:53,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:34:53,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-29 03:34:53,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=4689, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 03:34:53,361 INFO L87 Difference]: Start difference. First operand 155 states and 163 transitions. Second operand has 71 states, 70 states have (on average 2.2857142857142856) internal successors, (160), 67 states have internal predecessors, (160), 30 states have call successors, (31), 1 states have call predecessors, (31), 2 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2023-11-29 03:34:56,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:34:56,696 INFO L93 Difference]: Finished difference Result 211 states and 219 transitions. [2023-11-29 03:34:56,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 03:34:56,696 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 2.2857142857142856) internal successors, (160), 67 states have internal predecessors, (160), 30 states have call successors, (31), 1 states have call predecessors, (31), 2 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) Word has length 155 [2023-11-29 03:34:56,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:34:56,697 INFO L225 Difference]: With dead ends: 211 [2023-11-29 03:34:56,697 INFO L226 Difference]: Without dead ends: 209 [2023-11-29 03:34:56,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 292 SyntacticMatches, 15 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=844, Invalid=12728, Unknown=0, NotChecked=0, Total=13572 [2023-11-29 03:34:56,699 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 204 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 4090 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 4163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 4090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 03:34:56,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1354 Invalid, 4163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 4090 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 03:34:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-29 03:34:56,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 159. [2023-11-29 03:34:56,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 125 states have (on average 1.032) internal successors, (129), 126 states have internal predecessors, (129), 19 states have call successors, (19), 14 states have call predecessors, (19), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-29 03:34:56,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 167 transitions. [2023-11-29 03:34:56,760 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 167 transitions. Word has length 155 [2023-11-29 03:34:56,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:34:56,760 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 167 transitions. [2023-11-29 03:34:56,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 2.2857142857142856) internal successors, (160), 67 states have internal predecessors, (160), 30 states have call successors, (31), 1 states have call predecessors, (31), 2 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2023-11-29 03:34:56,760 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 167 transitions. [2023-11-29 03:34:56,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-29 03:34:56,761 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:34:56,761 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:34:56,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 03:34:56,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-29 03:34:56,962 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:34:56,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:34:56,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1140642002, now seen corresponding path program 38 times [2023-11-29 03:34:56,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:34:56,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132986422] [2023-11-29 03:34:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:34:56,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:34:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:34:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:34:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:34:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:34:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:34:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:34:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:34:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:34:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:34:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:34:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:34:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:34:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:34:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:34:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:34:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:34:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:34:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 261 proven. 327 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 03:34:57,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:34:57,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132986422] [2023-11-29 03:34:57,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132986422] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:34:57,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046323332] [2023-11-29 03:34:57,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:34:57,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:34:57,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:34:57,598 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:34:57,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 03:34:57,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:34:57,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:34:57,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 03:34:57,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:34:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 301 proven. 287 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 03:34:58,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:34:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 301 proven. 287 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 03:34:58,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046323332] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:34:58,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:34:58,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-11-29 03:34:58,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733613612] [2023-11-29 03:34:58,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:34:58,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 03:34:58,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:34:58,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 03:34:58,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 03:34:58,660 INFO L87 Difference]: Start difference. First operand 159 states and 167 transitions. Second operand has 50 states, 50 states have (on average 2.64) internal successors, (132), 50 states have internal predecessors, (132), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2023-11-29 03:34:59,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:34:59,102 INFO L93 Difference]: Finished difference Result 215 states and 223 transitions. [2023-11-29 03:34:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 03:34:59,103 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.64) internal successors, (132), 50 states have internal predecessors, (132), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 158 [2023-11-29 03:34:59,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:34:59,104 INFO L225 Difference]: With dead ends: 215 [2023-11-29 03:34:59,104 INFO L226 Difference]: Without dead ends: 166 [2023-11-29 03:34:59,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 302 SyntacticMatches, 29 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 03:34:59,105 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 180 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:34:59,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 176 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:34:59,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-29 03:34:59,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2023-11-29 03:34:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 121 states have (on average 1.024793388429752) internal successors, (124), 122 states have internal predecessors, (124), 19 states have call successors, (19), 14 states have call predecessors, (19), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-29 03:34:59,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 162 transitions. [2023-11-29 03:34:59,180 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 162 transitions. Word has length 158 [2023-11-29 03:34:59,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:34:59,180 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 162 transitions. [2023-11-29 03:34:59,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.64) internal successors, (132), 50 states have internal predecessors, (132), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2023-11-29 03:34:59,180 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 162 transitions. [2023-11-29 03:34:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-29 03:34:59,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:34:59,181 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:34:59,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 03:34:59,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-29 03:34:59,382 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:34:59,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:34:59,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1483548020, now seen corresponding path program 39 times [2023-11-29 03:34:59,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:34:59,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874877292] [2023-11-29 03:34:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:34:59,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:34:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:35:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:35:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:35:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:35:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:35:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:35:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:35:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:35:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:35:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:35:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:35:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:35:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:35:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:35:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:35:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:35:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:35:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 45 proven. 635 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-11-29 03:35:00,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:35:00,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874877292] [2023-11-29 03:35:00,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874877292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:35:00,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538607555] [2023-11-29 03:35:00,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:35:00,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:35:00,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:35:00,751 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:35:00,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 03:35:01,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-11-29 03:35:01,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:35:01,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-29 03:35:01,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:35:02,320 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 03:35:02,572 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 03:35:02,572 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 42 treesize of output 16 [2023-11-29 03:35:03,500 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 28 treesize of output 10 [2023-11-29 03:35:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 103 proven. 635 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-29 03:35:03,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:35:40,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538607555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:35:40,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:35:40,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 73 [2023-11-29 03:35:40,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494398717] [2023-11-29 03:35:40,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:35:40,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-11-29 03:35:40,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:35:40,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-11-29 03:35:40,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=5212, Unknown=8, NotChecked=0, Total=5550 [2023-11-29 03:35:40,184 INFO L87 Difference]: Start difference. First operand 155 states and 162 transitions. Second operand has 73 states, 72 states have (on average 2.2222222222222223) internal successors, (160), 69 states have internal predecessors, (160), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2023-11-29 03:35:43,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:35:43,147 INFO L93 Difference]: Finished difference Result 174 states and 179 transitions. [2023-11-29 03:35:43,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 03:35:43,148 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 2.2222222222222223) internal successors, (160), 69 states have internal predecessors, (160), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 162 [2023-11-29 03:35:43,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:35:43,149 INFO L225 Difference]: With dead ends: 174 [2023-11-29 03:35:43,149 INFO L226 Difference]: Without dead ends: 172 [2023-11-29 03:35:43,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 192 SyntacticMatches, 15 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3834 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=888, Invalid=11094, Unknown=8, NotChecked=0, Total=11990 [2023-11-29 03:35:43,151 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 150 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 3881 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 3923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 03:35:43,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1364 Invalid, 3923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3881 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 03:35:43,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-29 03:35:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2023-11-29 03:35:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 03:35:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2023-11-29 03:35:43,214 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 162 [2023-11-29 03:35:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:35:43,214 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2023-11-29 03:35:43,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 2.2222222222222223) internal successors, (160), 69 states have internal predecessors, (160), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2023-11-29 03:35:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2023-11-29 03:35:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-29 03:35:43,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:35:43,216 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:35:43,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-29 03:35:43,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-29 03:35:43,416 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:35:43,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:35:43,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1171188785, now seen corresponding path program 40 times [2023-11-29 03:35:43,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:35:43,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367671351] [2023-11-29 03:35:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:35:43,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:35:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:35:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:35:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:35:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:35:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:35:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:35:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:35:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:35:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:35:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:35:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:35:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:35:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:35:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:35:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:35:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:35:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:35:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 48 proven. 673 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-11-29 03:35:44,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:35:44,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367671351] [2023-11-29 03:35:44,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367671351] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:35:44,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11329496] [2023-11-29 03:35:44,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:35:44,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:35:44,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:35:44,795 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:35:44,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 03:35:45,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:35:45,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:35:45,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 86 conjunts are in the unsatisfiable core [2023-11-29 03:35:45,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:35:46,162 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 03:35:47,304 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 22 treesize of output 10 [2023-11-29 03:35:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 57 proven. 700 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2023-11-29 03:35:47,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:35:47,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:35:47,774 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 23 treesize of output 19 [2023-11-29 03:35:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 48 proven. 673 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-11-29 03:35:48,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11329496] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:35:48,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:35:48,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 38] total 92 [2023-11-29 03:35:48,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497181599] [2023-11-29 03:35:48,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:35:48,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-11-29 03:35:48,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:35:48,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-11-29 03:35:48,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=7955, Unknown=0, NotChecked=0, Total=8372 [2023-11-29 03:35:48,862 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 92 states, 91 states have (on average 2.208791208791209) internal successors, (201), 86 states have internal predecessors, (201), 47 states have call successors, (48), 1 states have call predecessors, (48), 2 states have return successors, (49), 49 states have call predecessors, (49), 47 states have call successors, (49) [2023-11-29 03:35:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:35:52,930 INFO L93 Difference]: Finished difference Result 222 states and 228 transitions. [2023-11-29 03:35:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-29 03:35:52,930 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 2.208791208791209) internal successors, (201), 86 states have internal predecessors, (201), 47 states have call successors, (48), 1 states have call predecessors, (48), 2 states have return successors, (49), 49 states have call predecessors, (49), 47 states have call successors, (49) Word has length 165 [2023-11-29 03:35:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:35:52,932 INFO L225 Difference]: With dead ends: 222 [2023-11-29 03:35:52,932 INFO L226 Difference]: Without dead ends: 220 [2023-11-29 03:35:52,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 295 SyntacticMatches, 15 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5798 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1111, Invalid=18629, Unknown=0, NotChecked=0, Total=19740 [2023-11-29 03:35:52,933 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 467 mSDsluCounter, 1450 mSDsCounter, 0 mSdLazyCounter, 4598 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 4695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 4598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:35:52,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 1493 Invalid, 4695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 4598 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 03:35:52,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-29 03:35:53,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 165. [2023-11-29 03:35:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 18 states have call successors, (18), 15 states have call predecessors, (18), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-29 03:35:53,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 170 transitions. [2023-11-29 03:35:53,011 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 170 transitions. Word has length 165 [2023-11-29 03:35:53,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:35:53,012 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 170 transitions. [2023-11-29 03:35:53,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 2.208791208791209) internal successors, (201), 86 states have internal predecessors, (201), 47 states have call successors, (48), 1 states have call predecessors, (48), 2 states have return successors, (49), 49 states have call predecessors, (49), 47 states have call successors, (49) [2023-11-29 03:35:53,012 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 170 transitions. [2023-11-29 03:35:53,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-29 03:35:53,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:35:53,013 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:35:53,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 03:35:53,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:35:53,213 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:35:53,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:35:53,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1423617964, now seen corresponding path program 41 times [2023-11-29 03:35:53,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:35:53,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636259281] [2023-11-29 03:35:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:35:53,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:35:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:35:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:35:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:35:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:35:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:35:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:35:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:35:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:35:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:35:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:35:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:35:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:35:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:35:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:35:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:35:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:35:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:35:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 302 proven. 373 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-29 03:35:53,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:35:53,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636259281] [2023-11-29 03:35:53,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636259281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:35:53,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147919302] [2023-11-29 03:35:53,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:35:53,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:35:53,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:35:53,886 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:35:53,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 03:35:54,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-11-29 03:35:54,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:35:54,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 03:35:54,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:35:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 345 proven. 330 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-29 03:35:54,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:35:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 345 proven. 330 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-29 03:35:55,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147919302] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:35:55,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:35:55,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-11-29 03:35:55,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634237471] [2023-11-29 03:35:55,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:35:55,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 03:35:55,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:35:55,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 03:35:55,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 03:35:55,171 INFO L87 Difference]: Start difference. First operand 165 states and 170 transitions. Second operand has 53 states, 53 states have (on average 2.641509433962264) internal successors, (140), 53 states have internal predecessors, (140), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-29 03:35:55,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:35:55,712 INFO L93 Difference]: Finished difference Result 226 states and 232 transitions. [2023-11-29 03:35:55,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 03:35:55,712 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.641509433962264) internal successors, (140), 53 states have internal predecessors, (140), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 168 [2023-11-29 03:35:55,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:35:55,714 INFO L225 Difference]: With dead ends: 226 [2023-11-29 03:35:55,714 INFO L226 Difference]: Without dead ends: 174 [2023-11-29 03:35:55,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 321 SyntacticMatches, 31 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 03:35:55,714 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 188 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:35:55,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 176 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:35:55,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-29 03:35:55,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 161. [2023-11-29 03:35:55,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 18 states have call successors, (18), 15 states have call predecessors, (18), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-29 03:35:55,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2023-11-29 03:35:55,787 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 168 [2023-11-29 03:35:55,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:35:55,787 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2023-11-29 03:35:55,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.641509433962264) internal successors, (140), 53 states have internal predecessors, (140), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-29 03:35:55,787 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2023-11-29 03:35:55,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-29 03:35:55,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:35:55,788 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:35:55,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-29 03:35:55,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-29 03:35:55,989 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:35:55,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:35:55,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1074272242, now seen corresponding path program 42 times [2023-11-29 03:35:55,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:35:55,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5655872] [2023-11-29 03:35:55,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:35:55,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:35:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:35:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:35:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:35:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:35:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:35:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:35:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:35:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:35:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:35:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:35:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:35:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:35:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:35:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:35:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:35:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:35:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:35:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:35:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1289 backedges. 48 proven. 725 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2023-11-29 03:35:57,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:35:57,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5655872] [2023-11-29 03:35:57,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5655872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:35:57,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322493768] [2023-11-29 03:35:57,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:35:57,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:35:57,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:35:57,526 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:35:57,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 03:35:58,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2023-11-29 03:35:58,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:35:58,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 87 conjunts are in the unsatisfiable core [2023-11-29 03:35:58,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:35:59,258 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 03:35:59,558 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 03:35:59,558 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 42 treesize of output 16 [2023-11-29 03:36:00,575 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 28 treesize of output 10 [2023-11-29 03:36:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1289 backedges. 113 proven. 758 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2023-11-29 03:36:00,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:36:21,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322493768] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:36:21,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:36:21,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 77 [2023-11-29 03:36:21,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228868620] [2023-11-29 03:36:21,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:36:21,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-29 03:36:21,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:36:21,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-29 03:36:21,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=5808, Unknown=5, NotChecked=0, Total=6162 [2023-11-29 03:36:21,312 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 77 states, 76 states have (on average 2.236842105263158) internal successors, (170), 73 states have internal predecessors, (170), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) [2023-11-29 03:36:24,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:36:24,777 INFO L93 Difference]: Finished difference Result 176 states and 179 transitions. [2023-11-29 03:36:24,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-29 03:36:24,778 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 2.236842105263158) internal successors, (170), 73 states have internal predecessors, (170), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) Word has length 172 [2023-11-29 03:36:24,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:36:24,779 INFO L225 Difference]: With dead ends: 176 [2023-11-29 03:36:24,779 INFO L226 Difference]: Without dead ends: 174 [2023-11-29 03:36:24,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 204 SyntacticMatches, 16 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4294 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=943, Invalid=12392, Unknown=5, NotChecked=0, Total=13340 [2023-11-29 03:36:24,781 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 176 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 4312 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 4352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:36:24,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 1479 Invalid, 4352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4312 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 03:36:24,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-29 03:36:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2023-11-29 03:36:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-29 03:36:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 171 transitions. [2023-11-29 03:36:24,853 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 171 transitions. Word has length 172 [2023-11-29 03:36:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:36:24,853 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 171 transitions. [2023-11-29 03:36:24,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 2.236842105263158) internal successors, (170), 73 states have internal predecessors, (170), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) [2023-11-29 03:36:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 171 transitions. [2023-11-29 03:36:24,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-29 03:36:24,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:36:24,855 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:36:24,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-29 03:36:25,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-29 03:36:25,055 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:36:25,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:36:25,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1848639731, now seen corresponding path program 43 times [2023-11-29 03:36:25,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:36:25,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318246047] [2023-11-29 03:36:25,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:36:25,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:36:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:36:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:36:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:36:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:36:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:36:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:36:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:36:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:36:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:36:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:36:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:36:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:36:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:36:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:36:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:36:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:36:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:36:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:36:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 51 proven. 766 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2023-11-29 03:36:26,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:36:26,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318246047] [2023-11-29 03:36:26,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318246047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:36:26,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096030660] [2023-11-29 03:36:26,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:36:26,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:36:26,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:36:26,459 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:36:26,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 03:36:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:26,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 90 conjunts are in the unsatisfiable core [2023-11-29 03:36:26,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:36:27,819 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 03:36:29,105 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 22 treesize of output 10 [2023-11-29 03:36:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 84 proven. 772 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2023-11-29 03:36:29,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:36:29,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:36:29,611 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 23 treesize of output 19 [2023-11-29 03:36:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 51 proven. 766 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2023-11-29 03:36:29,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096030660] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:36:29,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:36:29,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 40] total 79 [2023-11-29 03:36:29,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69989931] [2023-11-29 03:36:29,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:36:29,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-29 03:36:29,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:36:29,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-29 03:36:29,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=5847, Unknown=0, NotChecked=0, Total=6162 [2023-11-29 03:36:29,847 INFO L87 Difference]: Start difference. First operand 168 states and 171 transitions. Second operand has 79 states, 78 states have (on average 2.3076923076923075) internal successors, (180), 75 states have internal predecessors, (180), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) [2023-11-29 03:36:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:36:33,812 INFO L93 Difference]: Finished difference Result 235 states and 241 transitions. [2023-11-29 03:36:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-29 03:36:33,813 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 2.3076923076923075) internal successors, (180), 75 states have internal predecessors, (180), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) Word has length 175 [2023-11-29 03:36:33,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:36:33,814 INFO L225 Difference]: With dead ends: 235 [2023-11-29 03:36:33,814 INFO L226 Difference]: Without dead ends: 233 [2023-11-29 03:36:33,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 330 SyntacticMatches, 17 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5247 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=954, Invalid=16076, Unknown=0, NotChecked=0, Total=17030 [2023-11-29 03:36:33,815 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 195 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 4913 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 2038 SdHoareTripleChecker+Invalid, 5000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 4913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:36:33,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 2038 Invalid, 5000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 4913 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 03:36:33,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-11-29 03:36:33,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 175. [2023-11-29 03:36:33,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 19 states have call successors, (19), 16 states have call predecessors, (19), 16 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-29 03:36:33,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 180 transitions. [2023-11-29 03:36:33,898 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 180 transitions. Word has length 175 [2023-11-29 03:36:33,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:36:33,898 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 180 transitions. [2023-11-29 03:36:33,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 2.3076923076923075) internal successors, (180), 75 states have internal predecessors, (180), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) [2023-11-29 03:36:33,898 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 180 transitions. [2023-11-29 03:36:33,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-29 03:36:33,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:36:33,899 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:36:33,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 03:36:34,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 03:36:34,100 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:36:34,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:36:34,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1533809582, now seen corresponding path program 44 times [2023-11-29 03:36:34,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:36:34,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508891072] [2023-11-29 03:36:34,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:36:34,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:36:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:36:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:36:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:36:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:36:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:36:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:36:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:36:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:36:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:36:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:36:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:36:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:36:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:36:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:36:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:36:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:36:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:36:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:36:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 346 proven. 422 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-11-29 03:36:34,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:36:34,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508891072] [2023-11-29 03:36:34,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508891072] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:36:34,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525963229] [2023-11-29 03:36:34,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:36:34,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:36:34,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:36:34,886 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:36:34,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 03:36:35,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:36:35,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:36:35,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 03:36:35,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:36:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 392 proven. 376 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-11-29 03:36:35,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:36:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 392 proven. 376 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-11-29 03:36:36,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525963229] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:36:36,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:36:36,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2023-11-29 03:36:36,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531520530] [2023-11-29 03:36:36,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:36:36,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 03:36:36,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:36:36,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 03:36:36,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 03:36:36,195 INFO L87 Difference]: Start difference. First operand 175 states and 180 transitions. Second operand has 56 states, 56 states have (on average 2.642857142857143) internal successors, (148), 56 states have internal predecessors, (148), 18 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-29 03:36:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:36:36,755 INFO L93 Difference]: Finished difference Result 239 states and 245 transitions. [2023-11-29 03:36:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 03:36:36,755 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.642857142857143) internal successors, (148), 56 states have internal predecessors, (148), 18 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 178 [2023-11-29 03:36:36,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:36:36,756 INFO L225 Difference]: With dead ends: 239 [2023-11-29 03:36:36,756 INFO L226 Difference]: Without dead ends: 184 [2023-11-29 03:36:36,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 340 SyntacticMatches, 33 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1235, Invalid=4021, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 03:36:36,757 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 172 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:36:36,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 228 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:36:36,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-29 03:36:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 171. [2023-11-29 03:36:36,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 19 states have call successors, (19), 16 states have call predecessors, (19), 16 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-29 03:36:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2023-11-29 03:36:36,859 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 178 [2023-11-29 03:36:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:36:36,860 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2023-11-29 03:36:36,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.642857142857143) internal successors, (148), 56 states have internal predecessors, (148), 18 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-29 03:36:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2023-11-29 03:36:36,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-11-29 03:36:36,860 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:36:36,861 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:36:36,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-29 03:36:37,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-29 03:36:37,061 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:36:37,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:36:37,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1603940212, now seen corresponding path program 45 times [2023-11-29 03:36:37,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:36:37,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144844616] [2023-11-29 03:36:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:36:37,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:36:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:36:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:36:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:36:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:36:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:36:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:36:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:36:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:36:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:36:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:36:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:36:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:36:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:36:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:36:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:36:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:36:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:36:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:36:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:36:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:36:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 51 proven. 821 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2023-11-29 03:36:38,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:36:38,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144844616] [2023-11-29 03:36:38,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144844616] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:36:38,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037844344] [2023-11-29 03:36:38,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:36:38,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:36:38,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:36:38,610 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:36:38,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 03:36:40,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2023-11-29 03:36:40,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:36:40,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-29 03:36:40,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:36:41,416 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 03:36:41,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:36:41,705 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 34 treesize of output 14 [2023-11-29 03:36:42,970 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 22 treesize of output 10 [2023-11-29 03:36:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 117 proven. 821 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2023-11-29 03:36:43,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:37:03,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037844344] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:37:03,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:37:03,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 82 [2023-11-29 03:37:03,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771975631] [2023-11-29 03:37:03,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:37:03,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-11-29 03:37:03,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:37:03,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-11-29 03:37:03,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=6561, Unknown=5, NotChecked=0, Total=6972 [2023-11-29 03:37:03,790 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand has 82 states, 80 states have (on average 2.2625) internal successors, (181), 78 states have internal predecessors, (181), 36 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2023-11-29 03:37:07,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:37:07,365 INFO L93 Difference]: Finished difference Result 186 states and 189 transitions. [2023-11-29 03:37:07,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-29 03:37:07,365 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 80 states have (on average 2.2625) internal successors, (181), 78 states have internal predecessors, (181), 36 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) Word has length 182 [2023-11-29 03:37:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:37:07,366 INFO L225 Difference]: With dead ends: 186 [2023-11-29 03:37:07,366 INFO L226 Difference]: Without dead ends: 184 [2023-11-29 03:37:07,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 215 SyntacticMatches, 17 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=1072, Invalid=13929, Unknown=5, NotChecked=0, Total=15006 [2023-11-29 03:37:07,367 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 179 mSDsluCounter, 1676 mSDsCounter, 0 mSdLazyCounter, 4629 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 4675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 4629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:37:07,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 1719 Invalid, 4675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 4629 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 03:37:07,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-29 03:37:07,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 178. [2023-11-29 03:37:07,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-29 03:37:07,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 181 transitions. [2023-11-29 03:37:07,440 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 181 transitions. Word has length 182 [2023-11-29 03:37:07,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:37:07,440 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 181 transitions. [2023-11-29 03:37:07,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 80 states have (on average 2.2625) internal successors, (181), 78 states have internal predecessors, (181), 36 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2023-11-29 03:37:07,441 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 181 transitions. [2023-11-29 03:37:07,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-11-29 03:37:07,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:37:07,442 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:37:07,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-29 03:37:07,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-29 03:37:07,643 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:37:07,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:37:07,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1477288497, now seen corresponding path program 46 times [2023-11-29 03:37:07,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:37:07,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854481912] [2023-11-29 03:37:07,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:37:07,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:37:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:37:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:37:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:37:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:37:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:37:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:37:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:37:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:37:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:37:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:37:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:37:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:37:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:37:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:37:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:37:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:37:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:37:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:37:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:37:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 54 proven. 865 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2023-11-29 03:37:09,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:37:09,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854481912] [2023-11-29 03:37:09,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854481912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:37:09,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456481738] [2023-11-29 03:37:09,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:37:09,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:37:09,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:37:09,116 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:37:09,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-29 03:37:09,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:37:09,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:37:09,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-29 03:37:09,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:37:10,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:37:12,116 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 22 treesize of output 10 [2023-11-29 03:37:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 93 proven. 868 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-11-29 03:37:12,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:37:12,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:37:12,711 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 23 treesize of output 19 [2023-11-29 03:37:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 54 proven. 865 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2023-11-29 03:37:12,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456481738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:37:12,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:37:12,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 42] total 83 [2023-11-29 03:37:12,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155873424] [2023-11-29 03:37:12,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:37:12,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-11-29 03:37:12,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:37:12,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-11-29 03:37:12,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=6474, Unknown=0, NotChecked=0, Total=6806 [2023-11-29 03:37:12,960 INFO L87 Difference]: Start difference. First operand 178 states and 181 transitions. Second operand has 83 states, 82 states have (on average 2.317073170731707) internal successors, (190), 79 states have internal predecessors, (190), 36 states have call successors, (37), 1 states have call predecessors, (37), 2 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2023-11-29 03:37:17,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:37:17,473 INFO L93 Difference]: Finished difference Result 248 states and 254 transitions. [2023-11-29 03:37:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-29 03:37:17,473 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 2.317073170731707) internal successors, (190), 79 states have internal predecessors, (190), 36 states have call successors, (37), 1 states have call predecessors, (37), 2 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) Word has length 185 [2023-11-29 03:37:17,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:37:17,474 INFO L225 Difference]: With dead ends: 248 [2023-11-29 03:37:17,474 INFO L226 Difference]: Without dead ends: 246 [2023-11-29 03:37:17,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 349 SyntacticMatches, 18 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5870 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1009, Invalid=17897, Unknown=0, NotChecked=0, Total=18906 [2023-11-29 03:37:17,476 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 243 mSDsluCounter, 1886 mSDsCounter, 0 mSdLazyCounter, 5655 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 5742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 5655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:37:17,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 1933 Invalid, 5742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 5655 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 03:37:17,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-29 03:37:17,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 185. [2023-11-29 03:37:17,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 20 states have call successors, (20), 17 states have call predecessors, (20), 17 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-29 03:37:17,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 190 transitions. [2023-11-29 03:37:17,576 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 190 transitions. Word has length 185 [2023-11-29 03:37:17,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:37:17,577 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 190 transitions. [2023-11-29 03:37:17,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 2.317073170731707) internal successors, (190), 79 states have internal predecessors, (190), 36 states have call successors, (37), 1 states have call predecessors, (37), 2 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2023-11-29 03:37:17,577 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 190 transitions. [2023-11-29 03:37:17,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-29 03:37:17,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:37:17,578 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:37:17,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-29 03:37:17,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-29 03:37:17,779 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:37:17,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:37:17,779 INFO L85 PathProgramCache]: Analyzing trace with hash -622667180, now seen corresponding path program 47 times [2023-11-29 03:37:17,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:37:17,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406273771] [2023-11-29 03:37:17,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:37:17,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:37:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:37:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:37:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:37:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:37:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:37:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:37:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:37:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:37:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:37:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:37:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:37:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:37:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:37:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:37:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:37:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:37:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:37:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:37:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:37:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 393 proven. 474 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2023-11-29 03:37:18,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:37:18,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406273771] [2023-11-29 03:37:18,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406273771] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:37:18,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185166460] [2023-11-29 03:37:18,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:37:18,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:37:18,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:37:18,611 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:37:18,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-29 03:37:18,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2023-11-29 03:37:18,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:37:18,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 03:37:18,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:37:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 442 proven. 425 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2023-11-29 03:37:19,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:37:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 442 proven. 425 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2023-11-29 03:37:20,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185166460] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:37:20,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:37:20,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2023-11-29 03:37:20,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960395431] [2023-11-29 03:37:20,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:37:20,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-29 03:37:20,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:37:20,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-29 03:37:20,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=2619, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 03:37:20,409 INFO L87 Difference]: Start difference. First operand 185 states and 190 transitions. Second operand has 59 states, 59 states have (on average 2.6440677966101696) internal successors, (156), 59 states have internal predecessors, (156), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-11-29 03:37:21,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:37:21,033 INFO L93 Difference]: Finished difference Result 252 states and 258 transitions. [2023-11-29 03:37:21,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 03:37:21,033 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.6440677966101696) internal successors, (156), 59 states have internal predecessors, (156), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 188 [2023-11-29 03:37:21,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:37:21,035 INFO L225 Difference]: With dead ends: 252 [2023-11-29 03:37:21,035 INFO L226 Difference]: Without dead ends: 194 [2023-11-29 03:37:21,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 359 SyntacticMatches, 35 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1370, Invalid=4482, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 03:37:21,036 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 178 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:37:21,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 205 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:37:21,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-29 03:37:21,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 181. [2023-11-29 03:37:21,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 20 states have call successors, (20), 17 states have call predecessors, (20), 17 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-29 03:37:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 185 transitions. [2023-11-29 03:37:21,116 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 185 transitions. Word has length 188 [2023-11-29 03:37:21,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:37:21,116 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 185 transitions. [2023-11-29 03:37:21,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.6440677966101696) internal successors, (156), 59 states have internal predecessors, (156), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-11-29 03:37:21,116 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 185 transitions. [2023-11-29 03:37:21,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-11-29 03:37:21,117 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:37:21,117 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:37:21,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-29 03:37:21,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:37:21,318 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:37:21,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:37:21,318 INFO L85 PathProgramCache]: Analyzing trace with hash 743727986, now seen corresponding path program 48 times [2023-11-29 03:37:21,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:37:21,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729179378] [2023-11-29 03:37:21,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:37:21,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:37:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:37:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:37:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:37:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:37:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:37:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:37:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:37:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:37:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:37:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:37:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:37:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:37:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:37:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:37:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:37:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:37:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:37:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:37:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:37:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:37:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1629 backedges. 54 proven. 923 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2023-11-29 03:37:22,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:37:22,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729179378] [2023-11-29 03:37:22,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729179378] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:37:22,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506975450] [2023-11-29 03:37:22,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:37:22,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:37:22,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:37:22,975 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:37:22,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-29 03:37:23,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-11-29 03:37:23,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:37:23,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-29 03:37:23,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:37:25,159 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 03:37:25,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:37:25,440 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 34 treesize of output 14 [2023-11-29 03:37:26,764 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 22 treesize of output 10 [2023-11-29 03:37:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1629 backedges. 130 proven. 959 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-11-29 03:37:26,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:37:51,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506975450] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:37:51,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:37:51,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 86 [2023-11-29 03:37:51,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144346664] [2023-11-29 03:37:51,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:37:51,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-11-29 03:37:51,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:37:51,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-11-29 03:37:51,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=7223, Unknown=6, NotChecked=0, Total=7656 [2023-11-29 03:37:51,631 INFO L87 Difference]: Start difference. First operand 181 states and 185 transitions. Second operand has 86 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 82 states have internal predecessors, (191), 38 states have call successors, (39), 2 states have call predecessors, (39), 3 states have return successors, (39), 39 states have call predecessors, (39), 38 states have call successors, (39) [2023-11-29 03:37:55,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:37:55,593 INFO L93 Difference]: Finished difference Result 196 states and 199 transitions. [2023-11-29 03:37:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 03:37:55,593 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 82 states have internal predecessors, (191), 38 states have call successors, (39), 2 states have call predecessors, (39), 3 states have return successors, (39), 39 states have call predecessors, (39), 38 states have call successors, (39) Word has length 192 [2023-11-29 03:37:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:37:55,594 INFO L225 Difference]: With dead ends: 196 [2023-11-29 03:37:55,594 INFO L226 Difference]: Without dead ends: 194 [2023-11-29 03:37:55,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 227 SyntacticMatches, 18 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5310 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=1131, Invalid=15375, Unknown=6, NotChecked=0, Total=16512 [2023-11-29 03:37:55,595 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 217 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 5055 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 5100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 5055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:37:55,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 1591 Invalid, 5100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 5055 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 03:37:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-29 03:37:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2023-11-29 03:37:55,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-29 03:37:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 191 transitions. [2023-11-29 03:37:55,674 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 191 transitions. Word has length 192 [2023-11-29 03:37:55,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:37:55,674 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 191 transitions. [2023-11-29 03:37:55,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 82 states have internal predecessors, (191), 38 states have call successors, (39), 2 states have call predecessors, (39), 3 states have return successors, (39), 39 states have call predecessors, (39), 38 states have call successors, (39) [2023-11-29 03:37:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 191 transitions. [2023-11-29 03:37:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-29 03:37:55,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:37:55,675 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:37:55,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-29 03:37:55,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:37:55,876 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:37:55,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:37:55,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1330248333, now seen corresponding path program 49 times [2023-11-29 03:37:55,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:37:55,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138171996] [2023-11-29 03:37:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:37:55,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:37:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:37:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:37:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:37:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:37:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:37:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:37:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:37:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:37:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:37:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:37:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:37:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:37:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:37:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:37:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:37:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:37:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:37:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:37:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:37:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:37:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1679 backedges. 57 proven. 970 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2023-11-29 03:37:57,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:37:57,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138171996] [2023-11-29 03:37:57,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138171996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:37:57,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016979439] [2023-11-29 03:37:57,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:37:57,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:37:57,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:37:57,593 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:37:57,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-29 03:37:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:37:57,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-29 03:37:57,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:37:59,276 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 03:38:00,726 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 22 treesize of output 10 [2023-11-29 03:38:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1679 backedges. 93 proven. 979 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2023-11-29 03:38:00,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:38:01,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:38:01,340 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 23 treesize of output 19 [2023-11-29 03:38:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1679 backedges. 57 proven. 970 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2023-11-29 03:38:01,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016979439] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:38:01,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:38:01,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 44] total 89 [2023-11-29 03:38:01,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450341887] [2023-11-29 03:38:01,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:38:01,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-11-29 03:38:01,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:38:01,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-11-29 03:38:01,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=7474, Unknown=0, NotChecked=0, Total=7832 [2023-11-29 03:38:01,662 INFO L87 Difference]: Start difference. First operand 188 states and 191 transitions. Second operand has 89 states, 87 states have (on average 2.32183908045977) internal successors, (202), 84 states have internal predecessors, (202), 39 states have call successors, (40), 1 states have call predecessors, (40), 2 states have return successors, (40), 40 states have call predecessors, (40), 39 states have call successors, (40) [2023-11-29 03:38:06,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:38:06,372 INFO L93 Difference]: Finished difference Result 261 states and 267 transitions. [2023-11-29 03:38:06,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-29 03:38:06,372 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 87 states have (on average 2.32183908045977) internal successors, (202), 84 states have internal predecessors, (202), 39 states have call successors, (40), 1 states have call predecessors, (40), 2 states have return successors, (40), 40 states have call predecessors, (40), 39 states have call successors, (40) Word has length 195 [2023-11-29 03:38:06,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:38:06,374 INFO L225 Difference]: With dead ends: 261 [2023-11-29 03:38:06,374 INFO L226 Difference]: Without dead ends: 259 [2023-11-29 03:38:06,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 367 SyntacticMatches, 19 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6695 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1076, Invalid=20386, Unknown=0, NotChecked=0, Total=21462 [2023-11-29 03:38:06,375 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 253 mSDsluCounter, 2353 mSDsCounter, 0 mSdLazyCounter, 6045 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 2402 SdHoareTripleChecker+Invalid, 6136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 6045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:38:06,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 2402 Invalid, 6136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 6045 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 03:38:06,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-29 03:38:06,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 195. [2023-11-29 03:38:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 21 states have call successors, (21), 18 states have call predecessors, (21), 18 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-29 03:38:06,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 200 transitions. [2023-11-29 03:38:06,464 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 200 transitions. Word has length 195 [2023-11-29 03:38:06,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:38:06,464 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 200 transitions. [2023-11-29 03:38:06,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 87 states have (on average 2.32183908045977) internal successors, (202), 84 states have internal predecessors, (202), 39 states have call successors, (40), 1 states have call predecessors, (40), 2 states have return successors, (40), 40 states have call predecessors, (40), 39 states have call successors, (40) [2023-11-29 03:38:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 200 transitions. [2023-11-29 03:38:06,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-29 03:38:06,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:38:06,465 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:38:06,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-29 03:38:06,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:38:06,666 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:38:06,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:38:06,666 INFO L85 PathProgramCache]: Analyzing trace with hash 240752594, now seen corresponding path program 50 times [2023-11-29 03:38:06,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:38:06,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464921561] [2023-11-29 03:38:06,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:38:06,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:38:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:38:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:38:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:38:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:38:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:38:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:38:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:38:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:38:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:38:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:38:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:38:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:38:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:38:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:38:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:38:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:38:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:38:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:38:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:38:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:38:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 443 proven. 529 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 03:38:07,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:38:07,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464921561] [2023-11-29 03:38:07,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464921561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:38:07,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509826017] [2023-11-29 03:38:07,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:38:07,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:38:07,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:38:07,562 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:38:07,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-29 03:38:07,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:38:07,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:38:07,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 03:38:07,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:38:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 495 proven. 477 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 03:38:08,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:38:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 495 proven. 477 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-29 03:38:09,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509826017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:38:09,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:38:09,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2023-11-29 03:38:09,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563176387] [2023-11-29 03:38:09,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:38:09,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-29 03:38:09,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:38:09,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-29 03:38:09,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=2897, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 03:38:09,098 INFO L87 Difference]: Start difference. First operand 195 states and 200 transitions. Second operand has 62 states, 62 states have (on average 2.6451612903225805) internal successors, (164), 62 states have internal predecessors, (164), 20 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2023-11-29 03:38:09,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:38:09,770 INFO L93 Difference]: Finished difference Result 265 states and 271 transitions. [2023-11-29 03:38:09,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 03:38:09,771 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.6451612903225805) internal successors, (164), 62 states have internal predecessors, (164), 20 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 198 [2023-11-29 03:38:09,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:38:09,772 INFO L225 Difference]: With dead ends: 265 [2023-11-29 03:38:09,772 INFO L226 Difference]: Without dead ends: 204 [2023-11-29 03:38:09,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 378 SyntacticMatches, 37 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2983 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1512, Invalid=4968, Unknown=0, NotChecked=0, Total=6480 [2023-11-29 03:38:09,773 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 250 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:38:09,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 248 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:38:09,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-29 03:38:09,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 191. [2023-11-29 03:38:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 21 states have call successors, (21), 18 states have call predecessors, (21), 18 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-29 03:38:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 195 transitions. [2023-11-29 03:38:09,918 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 195 transitions. Word has length 198 [2023-11-29 03:38:09,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:38:09,918 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 195 transitions. [2023-11-29 03:38:09,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.6451612903225805) internal successors, (164), 62 states have internal predecessors, (164), 20 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2023-11-29 03:38:09,919 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 195 transitions. [2023-11-29 03:38:09,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-29 03:38:09,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:38:09,920 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:38:09,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-11-29 03:38:10,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:38:10,120 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:38:10,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:38:10,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1638864524, now seen corresponding path program 51 times [2023-11-29 03:38:10,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:38:10,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30279170] [2023-11-29 03:38:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:38:10,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:38:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:11,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:38:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:11,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:38:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:38:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:38:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:38:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:38:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:38:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:38:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:38:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:38:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:38:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:38:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:38:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:38:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:38:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:38:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:38:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:38:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:38:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:38:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 03:38:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1814 backedges. 57 proven. 1031 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2023-11-29 03:38:12,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:38:12,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30279170] [2023-11-29 03:38:12,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30279170] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:38:12,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790247837] [2023-11-29 03:38:12,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:38:12,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:38:12,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:38:12,076 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:38:12,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-29 03:38:14,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2023-11-29 03:38:14,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:38:14,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-29 03:38:14,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:38:15,407 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 03:38:15,698 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 03:38:15,699 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 42 treesize of output 16 [2023-11-29 03:38:17,044 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 28 treesize of output 10 [2023-11-29 03:38:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1814 backedges. 131 proven. 1031 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2023-11-29 03:38:17,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:38:21,664 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (< 19 (select (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) (+ |c_ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (+ 72 |c_ULTIMATE.start_main_~#a~0#1.offset|)))) is different from false [2023-11-29 03:38:21,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790247837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:38:21,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:38:21,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 88 [2023-11-29 03:38:21,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126970949] [2023-11-29 03:38:21,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:38:21,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-11-29 03:38:21,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:38:21,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-11-29 03:38:21,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=7455, Unknown=1, NotChecked=174, Total=8010 [2023-11-29 03:38:21,673 INFO L87 Difference]: Start difference. First operand 191 states and 195 transitions. Second operand has 88 states, 88 states have (on average 2.272727272727273) internal successors, (200), 84 states have internal predecessors, (200), 39 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (41), 41 states have call predecessors, (41), 39 states have call successors, (41) [2023-11-29 03:38:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:38:25,689 INFO L93 Difference]: Finished difference Result 206 states and 209 transitions. [2023-11-29 03:38:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-29 03:38:25,690 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.272727272727273) internal successors, (200), 84 states have internal predecessors, (200), 39 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (41), 41 states have call predecessors, (41), 39 states have call successors, (41) Word has length 202 [2023-11-29 03:38:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:38:25,691 INFO L225 Difference]: With dead ends: 206 [2023-11-29 03:38:25,691 INFO L226 Difference]: Without dead ends: 204 [2023-11-29 03:38:25,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 240 SyntacticMatches, 19 SemanticMatches, 131 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5633 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1044, Invalid=16251, Unknown=1, NotChecked=260, Total=17556 [2023-11-29 03:38:25,692 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 206 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 5655 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 5702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 5655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:38:25,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 1776 Invalid, 5702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 5655 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 03:38:25,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-29 03:38:25,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 198. [2023-11-29 03:38:25,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 157 states have internal predecessors, (159), 21 states have call successors, (21), 19 states have call predecessors, (21), 19 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-29 03:38:25,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 201 transitions. [2023-11-29 03:38:25,780 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 201 transitions. Word has length 202 [2023-11-29 03:38:25,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:38:25,781 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 201 transitions. [2023-11-29 03:38:25,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.272727272727273) internal successors, (200), 84 states have internal predecessors, (200), 39 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (41), 41 states have call predecessors, (41), 39 states have call successors, (41) [2023-11-29 03:38:25,781 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 201 transitions. [2023-11-29 03:38:25,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-29 03:38:25,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:38:25,782 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:38:25,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-11-29 03:38:25,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-11-29 03:38:25,982 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:38:25,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:38:25,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1780787249, now seen corresponding path program 52 times [2023-11-29 03:38:25,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:38:25,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699150762] [2023-11-29 03:38:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:38:25,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:38:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:38:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:38:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:38:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:38:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:38:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:38:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:38:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:38:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:38:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:38:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:38:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:38:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:38:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:38:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:38:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:38:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:38:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:38:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:38:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:38:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 03:38:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1867 backedges. 60 proven. 1081 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2023-11-29 03:38:27,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:38:27,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699150762] [2023-11-29 03:38:27,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699150762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:38:27,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329656774] [2023-11-29 03:38:27,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:38:27,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:38:27,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:38:27,797 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:38:27,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-29 03:38:28,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:38:28,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:38:28,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 102 conjunts are in the unsatisfiable core [2023-11-29 03:38:28,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:38:29,589 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 03:38:31,182 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 22 treesize of output 10 [2023-11-29 03:38:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1867 backedges. 60 proven. 1081 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2023-11-29 03:38:31,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:38:31,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:38:31,939 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 23 treesize of output 19 [2023-11-29 03:38:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1867 backedges. 60 proven. 1081 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2023-11-29 03:38:32,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329656774] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:38:32,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:38:32,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 47] total 95 [2023-11-29 03:38:32,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404931272] [2023-11-29 03:38:32,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:38:32,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-11-29 03:38:32,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:38:32,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-11-29 03:38:32,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=8541, Unknown=0, NotChecked=0, Total=8930 [2023-11-29 03:38:32,271 INFO L87 Difference]: Start difference. First operand 198 states and 201 transitions. Second operand has 95 states, 93 states have (on average 2.2795698924731185) internal successors, (212), 90 states have internal predecessors, (212), 41 states have call successors, (42), 1 states have call predecessors, (42), 2 states have return successors, (42), 42 states have call predecessors, (42), 41 states have call successors, (42) [2023-11-29 03:38:37,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:38:37,427 INFO L93 Difference]: Finished difference Result 274 states and 280 transitions. [2023-11-29 03:38:37,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-11-29 03:38:37,427 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 93 states have (on average 2.2795698924731185) internal successors, (212), 90 states have internal predecessors, (212), 41 states have call successors, (42), 1 states have call predecessors, (42), 2 states have return successors, (42), 42 states have call predecessors, (42), 41 states have call successors, (42) Word has length 205 [2023-11-29 03:38:37,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:38:37,428 INFO L225 Difference]: With dead ends: 274 [2023-11-29 03:38:37,428 INFO L226 Difference]: Without dead ends: 272 [2023-11-29 03:38:37,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 384 SyntacticMatches, 20 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8020 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1198, Invalid=24242, Unknown=0, NotChecked=0, Total=25440 [2023-11-29 03:38:37,430 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 293 mSDsluCounter, 2114 mSDsCounter, 0 mSdLazyCounter, 6311 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 2164 SdHoareTripleChecker+Invalid, 6416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 6311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:38:37,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 2164 Invalid, 6416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 6311 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 03:38:37,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-11-29 03:38:37,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 205. [2023-11-29 03:38:37,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 163 states have (on average 1.01840490797546) internal successors, (166), 163 states have internal predecessors, (166), 22 states have call successors, (22), 19 states have call predecessors, (22), 19 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-29 03:38:37,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 210 transitions. [2023-11-29 03:38:37,538 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 210 transitions. Word has length 205 [2023-11-29 03:38:37,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:38:37,539 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 210 transitions. [2023-11-29 03:38:37,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 93 states have (on average 2.2795698924731185) internal successors, (212), 90 states have internal predecessors, (212), 41 states have call successors, (42), 1 states have call predecessors, (42), 2 states have return successors, (42), 42 states have call predecessors, (42), 41 states have call successors, (42) [2023-11-29 03:38:37,539 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 210 transitions. [2023-11-29 03:38:37,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-11-29 03:38:37,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:38:37,540 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:38:37,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-11-29 03:38:37,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-11-29 03:38:37,740 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:38:37,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:38:37,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2495572, now seen corresponding path program 53 times [2023-11-29 03:38:37,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:38:37,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076932023] [2023-11-29 03:38:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:38:37,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:38:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:38:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:38:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:38:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:38:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:38:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:38:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:38:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:38:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:38:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:38:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:38:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:38:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:38:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:38:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:38:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:38:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:38:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:38:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:38:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:38:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 03:38:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 496 proven. 587 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-29 03:38:38,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:38:38,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076932023] [2023-11-29 03:38:38,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076932023] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:38:38,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863401712] [2023-11-29 03:38:38,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:38:38,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:38:38,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:38:38,757 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:38:38,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-29 03:38:39,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2023-11-29 03:38:39,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:38:39,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 03:38:39,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:38:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 551 proven. 532 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-29 03:38:40,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:38:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 551 proven. 532 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-29 03:38:40,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863401712] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:38:40,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:38:40,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2023-11-29 03:38:40,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206078259] [2023-11-29 03:38:40,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:38:40,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-29 03:38:40,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:38:40,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-29 03:38:40,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=3189, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 03:38:40,643 INFO L87 Difference]: Start difference. First operand 205 states and 210 transitions. Second operand has 65 states, 65 states have (on average 2.646153846153846) internal successors, (172), 65 states have internal predecessors, (172), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-11-29 03:38:41,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:38:41,300 INFO L93 Difference]: Finished difference Result 278 states and 284 transitions. [2023-11-29 03:38:41,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 03:38:41,301 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.646153846153846) internal successors, (172), 65 states have internal predecessors, (172), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 208 [2023-11-29 03:38:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:38:41,302 INFO L225 Difference]: With dead ends: 278 [2023-11-29 03:38:41,302 INFO L226 Difference]: Without dead ends: 214 [2023-11-29 03:38:41,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 397 SyntacticMatches, 39 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3291 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1661, Invalid=5479, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 03:38:41,302 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 194 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:38:41,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 294 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:38:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-29 03:38:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 201. [2023-11-29 03:38:41,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 22 states have call successors, (22), 19 states have call predecessors, (22), 19 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-29 03:38:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2023-11-29 03:38:41,401 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 208 [2023-11-29 03:38:41,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:38:41,401 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2023-11-29 03:38:41,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.646153846153846) internal successors, (172), 65 states have internal predecessors, (172), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-11-29 03:38:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2023-11-29 03:38:41,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-11-29 03:38:41,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:38:41,403 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 20, 20, 20, 20, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:38:41,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-11-29 03:38:41,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:38:41,603 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:38:41,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:38:41,604 INFO L85 PathProgramCache]: Analyzing trace with hash -480821518, now seen corresponding path program 54 times [2023-11-29 03:38:41,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:38:41,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546644816] [2023-11-29 03:38:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:38:41,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:38:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:38:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:38:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:38:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:38:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:38:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:38:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:38:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:38:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:38:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:38:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:38:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:38:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:38:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:38:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:38:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:38:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:38:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:38:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:38:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:38:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 03:38:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-29 03:38:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:38:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2009 backedges. 60 proven. 1145 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2023-11-29 03:38:43,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:38:43,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546644816] [2023-11-29 03:38:43,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546644816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:38:43,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156148618] [2023-11-29 03:38:43,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:38:43,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:38:43,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:38:43,448 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:38:43,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-29 03:38:44,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2023-11-29 03:38:44,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:38:44,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 103 conjunts are in the unsatisfiable core [2023-11-29 03:38:44,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:38:46,186 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 03:38:46,492 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 03:38:46,492 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 42 treesize of output 16 [2023-11-29 03:38:47,885 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 28 treesize of output 10 [2023-11-29 03:38:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2009 backedges. 144 proven. 1187 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2023-11-29 03:38:47,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:39:20,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156148618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:39:20,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:39:20,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 92 [2023-11-29 03:39:20,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159974906] [2023-11-29 03:39:20,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:39:20,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-11-29 03:39:20,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:39:20,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-11-29 03:39:20,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=8314, Unknown=8, NotChecked=0, Total=8742 [2023-11-29 03:39:20,879 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand has 92 states, 92 states have (on average 2.282608695652174) internal successors, (210), 88 states have internal predecessors, (210), 41 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (43), 43 states have call predecessors, (43), 41 states have call successors, (43) [2023-11-29 03:39:25,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:39:25,118 INFO L93 Difference]: Finished difference Result 216 states and 219 transitions. [2023-11-29 03:39:25,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 03:39:25,119 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.282608695652174) internal successors, (210), 88 states have internal predecessors, (210), 41 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (43), 43 states have call predecessors, (43), 41 states have call successors, (43) Word has length 212 [2023-11-29 03:39:25,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:39:25,120 INFO L225 Difference]: With dead ends: 216 [2023-11-29 03:39:25,120 INFO L226 Difference]: Without dead ends: 214 [2023-11-29 03:39:25,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 252 SyntacticMatches, 20 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6277 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=1156, Invalid=18018, Unknown=8, NotChecked=0, Total=19182 [2023-11-29 03:39:25,122 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 227 mSDsluCounter, 1784 mSDsCounter, 0 mSdLazyCounter, 5907 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 5961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 5907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:39:25,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 1833 Invalid, 5961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 5907 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 03:39:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-29 03:39:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 208. [2023-11-29 03:39:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 22 states have call successors, (22), 20 states have call predecessors, (22), 20 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-29 03:39:25,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 211 transitions. [2023-11-29 03:39:25,220 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 211 transitions. Word has length 212 [2023-11-29 03:39:25,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:39:25,221 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 211 transitions. [2023-11-29 03:39:25,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.282608695652174) internal successors, (210), 88 states have internal predecessors, (210), 41 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (43), 43 states have call predecessors, (43), 41 states have call successors, (43) [2023-11-29 03:39:25,221 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 211 transitions. [2023-11-29 03:39:25,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-11-29 03:39:25,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:39:25,222 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:39:25,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-11-29 03:39:25,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:39:25,423 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:39:25,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:39:25,423 INFO L85 PathProgramCache]: Analyzing trace with hash -432309773, now seen corresponding path program 55 times [2023-11-29 03:39:25,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:39:25,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115285005] [2023-11-29 03:39:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:39:25,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:39:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:39:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:39:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:39:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:39:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:39:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:39:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:39:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:39:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:39:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:39:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:39:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:39:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:39:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:39:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:39:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:39:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:39:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:39:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:39:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:39:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 03:39:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-29 03:39:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2065 backedges. 63 proven. 1198 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2023-11-29 03:39:27,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:39:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115285005] [2023-11-29 03:39:27,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115285005] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:39:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458771252] [2023-11-29 03:39:27,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:39:27,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:39:27,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:39:27,429 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:39:27,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-29 03:39:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:27,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 106 conjunts are in the unsatisfiable core [2023-11-29 03:39:27,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:39:29,362 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 03:39:31,112 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 22 treesize of output 10 [2023-11-29 03:39:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2065 backedges. 102 proven. 1210 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2023-11-29 03:39:31,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:39:31,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:39:31,829 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 23 treesize of output 19 [2023-11-29 03:39:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2065 backedges. 63 proven. 1198 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2023-11-29 03:39:32,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458771252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:39:32,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:39:32,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 48] total 97 [2023-11-29 03:39:32,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565131944] [2023-11-29 03:39:32,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:39:32,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-29 03:39:32,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:39:32,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-29 03:39:32,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=8920, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 03:39:32,168 INFO L87 Difference]: Start difference. First operand 208 states and 211 transitions. Second operand has 97 states, 95 states have (on average 2.336842105263158) internal successors, (222), 92 states have internal predecessors, (222), 43 states have call successors, (44), 1 states have call predecessors, (44), 2 states have return successors, (44), 44 states have call predecessors, (44), 43 states have call successors, (44) [2023-11-29 03:39:37,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:39:37,640 INFO L93 Difference]: Finished difference Result 287 states and 293 transitions. [2023-11-29 03:39:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-11-29 03:39:37,641 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 95 states have (on average 2.336842105263158) internal successors, (222), 92 states have internal predecessors, (222), 43 states have call successors, (44), 1 states have call predecessors, (44), 2 states have return successors, (44), 44 states have call predecessors, (44), 43 states have call successors, (44) Word has length 215 [2023-11-29 03:39:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:39:37,642 INFO L225 Difference]: With dead ends: 287 [2023-11-29 03:39:37,642 INFO L226 Difference]: Without dead ends: 285 [2023-11-29 03:39:37,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 405 SyntacticMatches, 21 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8132 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1186, Invalid=24574, Unknown=0, NotChecked=0, Total=25760 [2023-11-29 03:39:37,643 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 399 mSDsluCounter, 2266 mSDsCounter, 0 mSdLazyCounter, 6952 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 2319 SdHoareTripleChecker+Invalid, 7056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 6952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 03:39:37,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 2319 Invalid, 7056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 6952 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 03:39:37,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-11-29 03:39:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 215. [2023-11-29 03:39:37,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 171 states have (on average 1.0175438596491229) internal successors, (174), 171 states have internal predecessors, (174), 23 states have call successors, (23), 20 states have call predecessors, (23), 20 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-29 03:39:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 220 transitions. [2023-11-29 03:39:37,752 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 220 transitions. Word has length 215 [2023-11-29 03:39:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:39:37,752 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 220 transitions. [2023-11-29 03:39:37,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 95 states have (on average 2.336842105263158) internal successors, (222), 92 states have internal predecessors, (222), 43 states have call successors, (44), 1 states have call predecessors, (44), 2 states have return successors, (44), 44 states have call predecessors, (44), 43 states have call successors, (44) [2023-11-29 03:39:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 220 transitions. [2023-11-29 03:39:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-11-29 03:39:37,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:39:37,753 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:39:37,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-11-29 03:39:37,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-29 03:39:37,954 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:39:37,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:39:37,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1672074066, now seen corresponding path program 56 times [2023-11-29 03:39:37,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:39:37,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773115815] [2023-11-29 03:39:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:39:37,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:39:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:39:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:39:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:39:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:39:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:39:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:39:39,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:39:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:39:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:39:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:39:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:39:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:39:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:39:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:39:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:39:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:39:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:39:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:39:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:39:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:39:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 03:39:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-29 03:39:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2124 backedges. 552 proven. 648 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-29 03:39:39,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:39:39,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773115815] [2023-11-29 03:39:39,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773115815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:39:39,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989821054] [2023-11-29 03:39:39,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:39:39,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:39:39,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:39:39,191 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:39:39,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-29 03:39:39,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:39:39,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:39:39,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 03:39:39,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:39:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2124 backedges. 610 proven. 590 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-29 03:39:40,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:39:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2124 backedges. 610 proven. 590 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-29 03:39:41,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989821054] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:39:41,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:39:41,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2023-11-29 03:39:41,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120363646] [2023-11-29 03:39:41,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:39:41,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-11-29 03:39:41,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:39:41,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-11-29 03:39:41,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2023-11-29 03:39:41,136 INFO L87 Difference]: Start difference. First operand 215 states and 220 transitions. Second operand has 68 states, 68 states have (on average 2.6470588235294117) internal successors, (180), 68 states have internal predecessors, (180), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2023-11-29 03:39:41,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:39:41,945 INFO L93 Difference]: Finished difference Result 291 states and 297 transitions. [2023-11-29 03:39:41,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 03:39:41,945 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.6470588235294117) internal successors, (180), 68 states have internal predecessors, (180), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) Word has length 218 [2023-11-29 03:39:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:39:41,946 INFO L225 Difference]: With dead ends: 291 [2023-11-29 03:39:41,946 INFO L226 Difference]: Without dead ends: 224 [2023-11-29 03:39:41,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 416 SyntacticMatches, 41 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3614 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1817, Invalid=6015, Unknown=0, NotChecked=0, Total=7832 [2023-11-29 03:39:41,947 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 218 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:39:41,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 280 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:39:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-11-29 03:39:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 211. [2023-11-29 03:39:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 23 states have call successors, (23), 20 states have call predecessors, (23), 20 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-29 03:39:42,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 215 transitions. [2023-11-29 03:39:42,087 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 215 transitions. Word has length 218 [2023-11-29 03:39:42,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:39:42,087 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 215 transitions. [2023-11-29 03:39:42,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.6470588235294117) internal successors, (180), 68 states have internal predecessors, (180), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2023-11-29 03:39:42,088 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 215 transitions. [2023-11-29 03:39:42,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-11-29 03:39:42,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:39:42,089 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:39:42,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-11-29 03:39:42,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:39:42,290 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:39:42,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:39:42,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1242911604, now seen corresponding path program 57 times [2023-11-29 03:39:42,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:39:42,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988660741] [2023-11-29 03:39:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:39:42,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:39:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:39:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:39:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:39:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:39:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:39:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:39:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:39:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:39:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:39:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:39:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:39:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:39:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:39:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:39:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:39:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:39:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:39:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:39:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:39:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:39:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 03:39:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-29 03:39:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2023-11-29 03:39:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:39:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 63 proven. 1265 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-11-29 03:39:44,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:39:44,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988660741] [2023-11-29 03:39:44,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988660741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:39:44,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620251454] [2023-11-29 03:39:44,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:39:44,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:39:44,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:39:44,449 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:39:44,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-29 03:39:47,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-11-29 03:39:47,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:39:47,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 102 conjunts are in the unsatisfiable core [2023-11-29 03:39:47,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:39:48,905 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 03:39:49,230 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 03:39:49,230 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 42 treesize of output 16 [2023-11-29 03:39:50,696 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 28 treesize of output 10 [2023-11-29 03:39:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 145 proven. 1265 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2023-11-29 03:39:50,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:40:35,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620251454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:40:35,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:40:35,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 97 [2023-11-29 03:40:35,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907730780] [2023-11-29 03:40:35,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:40:35,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-29 03:40:35,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:40:35,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-29 03:40:35,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=9248, Unknown=10, NotChecked=0, Total=9702 [2023-11-29 03:40:35,741 INFO L87 Difference]: Start difference. First operand 211 states and 215 transitions. Second operand has 97 states, 96 states have (on average 2.2916666666666665) internal successors, (220), 93 states have internal predecessors, (220), 43 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (45), 45 states have call predecessors, (45), 43 states have call successors, (45) [2023-11-29 03:40:40,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:40:40,745 INFO L93 Difference]: Finished difference Result 226 states and 229 transitions. [2023-11-29 03:40:40,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-29 03:40:40,746 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 2.2916666666666665) internal successors, (220), 93 states have internal predecessors, (220), 43 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (45), 45 states have call predecessors, (45), 43 states have call successors, (45) Word has length 222 [2023-11-29 03:40:40,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:40:40,747 INFO L225 Difference]: With dead ends: 226 [2023-11-29 03:40:40,747 INFO L226 Difference]: Without dead ends: 224 [2023-11-29 03:40:40,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 264 SyntacticMatches, 21 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6980 ImplicationChecksByTransitivity, 50.2s TimeCoverageRelationStatistics Valid=1218, Invalid=19942, Unknown=10, NotChecked=0, Total=21170 [2023-11-29 03:40:40,748 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 174 mSDsluCounter, 2634 mSDsCounter, 0 mSdLazyCounter, 7246 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2685 SdHoareTripleChecker+Invalid, 7300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 7246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:40:40,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 2685 Invalid, 7300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 7246 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-29 03:40:40,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-11-29 03:40:40,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 218. [2023-11-29 03:40:40,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-29 03:40:40,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 221 transitions. [2023-11-29 03:40:40,865 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 221 transitions. Word has length 222 [2023-11-29 03:40:40,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:40:40,865 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 221 transitions. [2023-11-29 03:40:40,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 2.2916666666666665) internal successors, (220), 93 states have internal predecessors, (220), 43 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (45), 45 states have call predecessors, (45), 43 states have call successors, (45) [2023-11-29 03:40:40,865 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 221 transitions. [2023-11-29 03:40:40,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-11-29 03:40:40,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:40:40,866 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:40:40,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-11-29 03:40:41,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:40:41,067 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:40:41,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:40:41,067 INFO L85 PathProgramCache]: Analyzing trace with hash 672136753, now seen corresponding path program 58 times [2023-11-29 03:40:41,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:40:41,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747387436] [2023-11-29 03:40:41,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:40:41,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:40:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:40:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:40:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:40:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:40:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:40:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:40:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:40:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:40:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:40:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:40:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:40:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:40:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:40:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:40:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:40:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:40:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:40:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:40:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:40:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:40:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 03:40:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-29 03:40:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2023-11-29 03:40:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2273 backedges. 66 proven. 1321 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-11-29 03:40:43,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:40:43,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747387436] [2023-11-29 03:40:43,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747387436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:40:43,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899624085] [2023-11-29 03:40:43,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:40:43,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:40:43,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:40:43,193 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:40:43,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-29 03:40:43,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:40:43,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:40:43,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 110 conjunts are in the unsatisfiable core [2023-11-29 03:40:43,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:40:45,459 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 03:40:47,329 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 22 treesize of output 10 [2023-11-29 03:40:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2273 backedges. 72 proven. 1369 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2023-11-29 03:40:47,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:40:48,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:40:48,087 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 23 treesize of output 19 [2023-11-29 03:40:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2273 backedges. 66 proven. 1321 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-11-29 03:40:48,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899624085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:40:48,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:40:48,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 50] total 99 [2023-11-29 03:40:48,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408001900] [2023-11-29 03:40:48,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:40:48,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-11-29 03:40:48,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:40:48,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-11-29 03:40:48,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=9302, Unknown=0, NotChecked=0, Total=9702 [2023-11-29 03:40:48,388 INFO L87 Difference]: Start difference. First operand 218 states and 221 transitions. Second operand has 99 states, 98 states have (on average 2.3469387755102042) internal successors, (230), 95 states have internal predecessors, (230), 44 states have call successors, (45), 1 states have call predecessors, (45), 2 states have return successors, (45), 45 states have call predecessors, (45), 44 states have call successors, (45) [2023-11-29 03:40:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:40:54,151 INFO L93 Difference]: Finished difference Result 300 states and 306 transitions. [2023-11-29 03:40:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-11-29 03:40:54,151 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 2.3469387755102042) internal successors, (230), 95 states have internal predecessors, (230), 44 states have call successors, (45), 1 states have call predecessors, (45), 2 states have return successors, (45), 45 states have call predecessors, (45), 44 states have call successors, (45) Word has length 225 [2023-11-29 03:40:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:40:54,152 INFO L225 Difference]: With dead ends: 300 [2023-11-29 03:40:54,152 INFO L226 Difference]: Without dead ends: 298 [2023-11-29 03:40:54,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 425 SyntacticMatches, 22 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8712 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1229, Invalid=26161, Unknown=0, NotChecked=0, Total=27390 [2023-11-29 03:40:54,154 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 287 mSDsluCounter, 2837 mSDsCounter, 0 mSdLazyCounter, 7132 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 2892 SdHoareTripleChecker+Invalid, 7248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 7132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:40:54,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 2892 Invalid, 7248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 7132 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-29 03:40:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-29 03:40:54,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 225. [2023-11-29 03:40:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 179 states have (on average 1.0167597765363128) internal successors, (182), 179 states have internal predecessors, (182), 24 states have call successors, (24), 21 states have call predecessors, (24), 21 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-29 03:40:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 230 transitions. [2023-11-29 03:40:54,275 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 230 transitions. Word has length 225 [2023-11-29 03:40:54,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:40:54,275 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 230 transitions. [2023-11-29 03:40:54,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 2.3469387755102042) internal successors, (230), 95 states have internal predecessors, (230), 44 states have call successors, (45), 1 states have call predecessors, (45), 2 states have return successors, (45), 45 states have call predecessors, (45), 44 states have call successors, (45) [2023-11-29 03:40:54,275 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 230 transitions. [2023-11-29 03:40:54,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-11-29 03:40:54,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:40:54,276 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:40:54,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-11-29 03:40:54,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-11-29 03:40:54,477 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:40:54,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:40:54,478 INFO L85 PathProgramCache]: Analyzing trace with hash 494075476, now seen corresponding path program 59 times [2023-11-29 03:40:54,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:40:54,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363151669] [2023-11-29 03:40:54,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:40:54,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:40:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:40:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:40:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:40:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:40:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:40:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:40:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:40:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:40:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:40:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:40:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:40:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:40:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:40:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:40:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:40:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:40:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:40:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:40:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:40:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:40:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 03:40:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-29 03:40:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2023-11-29 03:40:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:40:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2335 backedges. 611 proven. 712 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2023-11-29 03:40:55,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:40:55,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363151669] [2023-11-29 03:40:55,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363151669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:40:55,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606042250] [2023-11-29 03:40:55,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:40:55,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:40:55,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:40:55,640 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:40:55,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-29 03:40:56,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2023-11-29 03:40:56,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:40:56,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 03:40:56,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:40:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2335 backedges. 672 proven. 651 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2023-11-29 03:40:57,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:40:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2335 backedges. 672 proven. 651 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2023-11-29 03:40:57,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606042250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:40:57,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:40:57,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 71 [2023-11-29 03:40:57,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034415162] [2023-11-29 03:40:57,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:40:57,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-29 03:40:57,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:40:57,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-29 03:40:57,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3815, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 03:40:57,886 INFO L87 Difference]: Start difference. First operand 225 states and 230 transitions. Second operand has 71 states, 71 states have (on average 2.647887323943662) internal successors, (188), 71 states have internal predecessors, (188), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-11-29 03:40:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:40:58,674 INFO L93 Difference]: Finished difference Result 304 states and 310 transitions. [2023-11-29 03:40:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 03:40:58,675 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.647887323943662) internal successors, (188), 71 states have internal predecessors, (188), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 228 [2023-11-29 03:40:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:40:58,676 INFO L225 Difference]: With dead ends: 304 [2023-11-29 03:40:58,676 INFO L226 Difference]: Without dead ends: 234 [2023-11-29 03:40:58,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 435 SyntacticMatches, 43 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3952 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1980, Invalid=6576, Unknown=0, NotChecked=0, Total=8556 [2023-11-29 03:40:58,677 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 216 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:40:58,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 248 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:40:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-29 03:40:58,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 221. [2023-11-29 03:40:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 24 states have call successors, (24), 21 states have call predecessors, (24), 21 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-29 03:40:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2023-11-29 03:40:58,799 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 228 [2023-11-29 03:40:58,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:40:58,799 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2023-11-29 03:40:58,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.647887323943662) internal successors, (188), 71 states have internal predecessors, (188), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-11-29 03:40:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2023-11-29 03:40:58,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2023-11-29 03:40:58,800 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:40:58,800 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 22, 22, 22, 22, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:40:58,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-11-29 03:40:59,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-11-29 03:40:59,001 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:40:59,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:40:59,001 INFO L85 PathProgramCache]: Analyzing trace with hash 862759538, now seen corresponding path program 60 times [2023-11-29 03:40:59,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:40:59,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937837147] [2023-11-29 03:40:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:40:59,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:40:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:41:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:41:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:41:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:41:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:41:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:41:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:41:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:41:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:41:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:41:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:41:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:41:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:41:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:41:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:41:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:41:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:41:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:41:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:41:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:41:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 03:41:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-29 03:41:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2023-11-29 03:41:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2023-11-29 03:41:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2429 backedges. 66 proven. 1391 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2023-11-29 03:41:01,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:01,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937837147] [2023-11-29 03:41:01,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937837147] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:41:01,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805697256] [2023-11-29 03:41:01,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:41:01,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:41:01,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:41:01,187 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:41:01,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-29 03:41:03,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2023-11-29 03:41:03,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:41:03,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 111 conjunts are in the unsatisfiable core [2023-11-29 03:41:03,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:41:04,648 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 03:41:05,018 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 03:41:05,018 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 42 treesize of output 16 [2023-11-29 03:41:06,885 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 28 treesize of output 10 [2023-11-29 03:41:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2429 backedges. 152 proven. 1391 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-11-29 03:41:06,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:41:20,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805697256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:41:20,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:41:20,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 53] total 101 [2023-11-29 03:41:20,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184165483] [2023-11-29 03:41:20,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:41:20,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-29 03:41:20,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:20,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-29 03:41:20,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=10236, Unknown=3, NotChecked=0, Total=10712 [2023-11-29 03:41:20,072 INFO L87 Difference]: Start difference. First operand 221 states and 225 transitions. Second operand has 101 states, 101 states have (on average 2.277227722772277) internal successors, (230), 97 states have internal predecessors, (230), 45 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (47), 47 states have call predecessors, (47), 45 states have call successors, (47) [2023-11-29 03:41:25,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:41:25,724 INFO L93 Difference]: Finished difference Result 236 states and 239 transitions. [2023-11-29 03:41:25,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-29 03:41:25,725 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.277227722772277) internal successors, (230), 97 states have internal predecessors, (230), 45 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (47), 47 states have call predecessors, (47), 45 states have call successors, (47) Word has length 232 [2023-11-29 03:41:25,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:41:25,726 INFO L225 Difference]: With dead ends: 236 [2023-11-29 03:41:25,726 INFO L226 Difference]: Without dead ends: 234 [2023-11-29 03:41:25,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 273 SyntacticMatches, 23 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7859 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=1305, Invalid=22254, Unknown=3, NotChecked=0, Total=23562 [2023-11-29 03:41:25,728 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 137 mSDsluCounter, 2879 mSDsCounter, 0 mSdLazyCounter, 7855 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 2931 SdHoareTripleChecker+Invalid, 7912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 7855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:41:25,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 2931 Invalid, 7912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 7855 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-29 03:41:25,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-29 03:41:25,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2023-11-29 03:41:25,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 181 states have (on average 1.011049723756906) internal successors, (183), 181 states have internal predecessors, (183), 24 states have call successors, (24), 22 states have call predecessors, (24), 22 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-29 03:41:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 231 transitions. [2023-11-29 03:41:25,848 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 231 transitions. Word has length 232 [2023-11-29 03:41:25,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:41:25,848 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 231 transitions. [2023-11-29 03:41:25,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.277227722772277) internal successors, (230), 97 states have internal predecessors, (230), 45 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (47), 47 states have call predecessors, (47), 45 states have call successors, (47) [2023-11-29 03:41:25,848 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 231 transitions. [2023-11-29 03:41:25,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-11-29 03:41:25,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:41:25,849 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 22, 22, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:41:25,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-11-29 03:41:26,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-11-29 03:41:26,050 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:41:26,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:26,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1390698099, now seen corresponding path program 61 times [2023-11-29 03:41:26,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:26,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748244268] [2023-11-29 03:41:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:26,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:41:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:41:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:41:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:41:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:41:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:41:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:41:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:41:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:41:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:41:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:41:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:41:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:41:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:41:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:41:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:41:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:41:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:41:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:41:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:41:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 03:41:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-29 03:41:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2023-11-29 03:41:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2023-11-29 03:41:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2491 backedges. 69 proven. 1450 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2023-11-29 03:41:28,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:28,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748244268] [2023-11-29 03:41:28,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748244268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:41:28,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888323455] [2023-11-29 03:41:28,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:41:28,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:41:28,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:41:28,303 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:41:28,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-29 03:41:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:28,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 114 conjunts are in the unsatisfiable core [2023-11-29 03:41:28,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:41:30,429 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 03:41:32,407 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 22 treesize of output 10 [2023-11-29 03:41:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2491 backedges. 111 proven. 1465 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2023-11-29 03:41:32,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:41:33,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:41:33,281 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 23 treesize of output 19 [2023-11-29 03:41:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2491 backedges. 69 proven. 1450 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2023-11-29 03:41:33,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888323455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:41:33,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:41:33,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 52] total 105 [2023-11-29 03:41:33,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138330993] [2023-11-29 03:41:33,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:41:33,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-11-29 03:41:33,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:33,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-11-29 03:41:33,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=10494, Unknown=0, NotChecked=0, Total=10920 [2023-11-29 03:41:33,652 INFO L87 Difference]: Start difference. First operand 228 states and 231 transitions. Second operand has 105 states, 103 states have (on average 2.349514563106796) internal successors, (242), 100 states have internal predecessors, (242), 47 states have call successors, (48), 1 states have call predecessors, (48), 2 states have return successors, (48), 48 states have call predecessors, (48), 47 states have call successors, (48) [2023-11-29 03:41:40,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:41:40,404 INFO L93 Difference]: Finished difference Result 313 states and 319 transitions. [2023-11-29 03:41:40,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-11-29 03:41:40,404 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 103 states have (on average 2.349514563106796) internal successors, (242), 100 states have internal predecessors, (242), 47 states have call successors, (48), 1 states have call predecessors, (48), 2 states have return successors, (48), 48 states have call predecessors, (48), 47 states have call successors, (48) Word has length 235 [2023-11-29 03:41:40,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:41:40,406 INFO L225 Difference]: With dead ends: 313 [2023-11-29 03:41:40,406 INFO L226 Difference]: Without dead ends: 311 [2023-11-29 03:41:40,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 443 SyntacticMatches, 23 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9709 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1296, Invalid=29154, Unknown=0, NotChecked=0, Total=30450 [2023-11-29 03:41:40,407 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 452 mSDsluCounter, 2799 mSDsCounter, 0 mSdLazyCounter, 8398 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 2856 SdHoareTripleChecker+Invalid, 8514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 8398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:41:40,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 2856 Invalid, 8514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 8398 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 03:41:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-11-29 03:41:40,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 235. [2023-11-29 03:41:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 187 states have (on average 1.0160427807486632) internal successors, (190), 187 states have internal predecessors, (190), 25 states have call successors, (25), 22 states have call predecessors, (25), 22 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-29 03:41:40,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 240 transitions. [2023-11-29 03:41:40,541 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 240 transitions. Word has length 235 [2023-11-29 03:41:40,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:41:40,541 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 240 transitions. [2023-11-29 03:41:40,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 103 states have (on average 2.349514563106796) internal successors, (242), 100 states have internal predecessors, (242), 47 states have call successors, (48), 1 states have call predecessors, (48), 2 states have return successors, (48), 48 states have call predecessors, (48), 47 states have call successors, (48) [2023-11-29 03:41:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 240 transitions. [2023-11-29 03:41:40,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2023-11-29 03:41:40,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:41:40,542 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:41:40,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-11-29 03:41:40,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-11-29 03:41:40,743 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:41:40,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:40,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1038130898, now seen corresponding path program 62 times [2023-11-29 03:41:40,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:40,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146707927] [2023-11-29 03:41:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:40,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:41,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:41:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:41,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:41:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:41,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:41:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:41,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:41:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:41,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:41:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:41,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:41:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:41,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:41:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:41,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:41:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:41:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:41:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:41:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:41:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:41:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:41:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:41:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:41:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:41:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:41:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:41:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:41:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 03:41:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-29 03:41:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2023-11-29 03:41:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2023-11-29 03:41:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:42,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 673 proven. 779 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2023-11-29 03:41:42,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:42,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146707927] [2023-11-29 03:41:42,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146707927] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:41:42,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208695418] [2023-11-29 03:41:42,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:41:42,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:41:42,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:41:42,021 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:41:42,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-11-29 03:41:42,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:41:42,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:41:42,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 03:41:42,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:41:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 737 proven. 715 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2023-11-29 03:41:43,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:41:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 737 proven. 715 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2023-11-29 03:41:44,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208695418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:41:44,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:41:44,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 74 [2023-11-29 03:41:44,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458505303] [2023-11-29 03:41:44,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:41:44,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-29 03:41:44,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:41:44,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-29 03:41:44,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1253, Invalid=4149, Unknown=0, NotChecked=0, Total=5402 [2023-11-29 03:41:44,094 INFO L87 Difference]: Start difference. First operand 235 states and 240 transitions. Second operand has 74 states, 74 states have (on average 2.6486486486486487) internal successors, (196), 74 states have internal predecessors, (196), 24 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2023-11-29 03:41:45,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:41:45,091 INFO L93 Difference]: Finished difference Result 317 states and 323 transitions. [2023-11-29 03:41:45,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 03:41:45,091 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.6486486486486487) internal successors, (196), 74 states have internal predecessors, (196), 24 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) Word has length 238 [2023-11-29 03:41:45,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:41:45,092 INFO L225 Difference]: With dead ends: 317 [2023-11-29 03:41:45,093 INFO L226 Difference]: Without dead ends: 244 [2023-11-29 03:41:45,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 454 SyntacticMatches, 45 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4305 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2150, Invalid=7162, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 03:41:45,094 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 284 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:41:45,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 277 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:41:45,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-11-29 03:41:45,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 231. [2023-11-29 03:41:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 states have internal predecessors, (185), 25 states have call successors, (25), 22 states have call predecessors, (25), 22 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-29 03:41:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 235 transitions. [2023-11-29 03:41:45,230 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 235 transitions. Word has length 238 [2023-11-29 03:41:45,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:41:45,230 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 235 transitions. [2023-11-29 03:41:45,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.6486486486486487) internal successors, (196), 74 states have internal predecessors, (196), 24 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2023-11-29 03:41:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 235 transitions. [2023-11-29 03:41:45,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-11-29 03:41:45,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:41:45,231 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 23, 23, 23, 23, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:41:45,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-11-29 03:41:45,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:41:45,432 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:41:45,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:41:45,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1365994868, now seen corresponding path program 63 times [2023-11-29 03:41:45,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:41:45,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263130604] [2023-11-29 03:41:45,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:41:45,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:41:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:41:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:41:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:41:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:41:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:41:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:41:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:41:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:41:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:41:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:41:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:41:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:41:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:41:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:41:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:41:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:41:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:41:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:41:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:41:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:41:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 03:41:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-29 03:41:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2023-11-29 03:41:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2023-11-29 03:41:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2023-11-29 03:41:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:41:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 69 proven. 1523 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2023-11-29 03:41:47,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:41:47,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263130604] [2023-11-29 03:41:47,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263130604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:41:47,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570284000] [2023-11-29 03:41:47,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:41:47,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:41:47,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:41:47,696 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:41:47,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-11-29 03:41:51,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2023-11-29 03:41:51,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:41:51,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 110 conjunts are in the unsatisfiable core [2023-11-29 03:41:51,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:41:52,890 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 03:41:53,232 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 03:41:53,232 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 42 treesize of output 16 [2023-11-29 03:41:55,029 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 28 treesize of output 10 [2023-11-29 03:41:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 159 proven. 1523 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2023-11-29 03:41:55,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:04,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570284000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:04,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:42:04,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 104 [2023-11-29 03:42:04,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438132614] [2023-11-29 03:42:04,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:04,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2023-11-29 03:42:04,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:04,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2023-11-29 03:42:04,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=10651, Unknown=2, NotChecked=0, Total=11130 [2023-11-29 03:42:04,157 INFO L87 Difference]: Start difference. First operand 231 states and 235 transitions. Second operand has 104 states, 104 states have (on average 2.3076923076923075) internal successors, (240), 100 states have internal predecessors, (240), 47 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (49), 49 states have call predecessors, (49), 47 states have call successors, (49) [2023-11-29 03:42:09,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:42:09,787 INFO L93 Difference]: Finished difference Result 246 states and 249 transitions. [2023-11-29 03:42:09,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-29 03:42:09,787 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.3076923076923075) internal successors, (240), 100 states have internal predecessors, (240), 47 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (49), 49 states have call predecessors, (49), 47 states have call successors, (49) Word has length 242 [2023-11-29 03:42:09,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:42:09,788 INFO L225 Difference]: With dead ends: 246 [2023-11-29 03:42:09,788 INFO L226 Difference]: Without dead ends: 244 [2023-11-29 03:42:09,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 288 SyntacticMatches, 23 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8107 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=1321, Invalid=23169, Unknown=2, NotChecked=0, Total=24492 [2023-11-29 03:42:09,790 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 158 mSDsluCounter, 2858 mSDsCounter, 0 mSdLazyCounter, 7954 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 2913 SdHoareTripleChecker+Invalid, 8017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 7954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:42:09,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 2913 Invalid, 8017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 7954 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-29 03:42:09,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-11-29 03:42:09,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 238. [2023-11-29 03:42:09,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 189 states have (on average 1.0105820105820107) internal successors, (191), 189 states have internal predecessors, (191), 25 states have call successors, (25), 23 states have call predecessors, (25), 23 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-29 03:42:09,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 241 transitions. [2023-11-29 03:42:09,921 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 241 transitions. Word has length 242 [2023-11-29 03:42:09,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:42:09,922 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 241 transitions. [2023-11-29 03:42:09,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.3076923076923075) internal successors, (240), 100 states have internal predecessors, (240), 47 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (49), 49 states have call predecessors, (49), 47 states have call successors, (49) [2023-11-29 03:42:09,922 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 241 transitions. [2023-11-29 03:42:09,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-29 03:42:09,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:42:09,923 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:09,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-11-29 03:42:10,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:10,124 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:42:10,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:10,124 INFO L85 PathProgramCache]: Analyzing trace with hash -456416207, now seen corresponding path program 64 times [2023-11-29 03:42:10,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:10,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400742573] [2023-11-29 03:42:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:10,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:42:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:42:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:42:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:42:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:42:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:42:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:42:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:42:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:42:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:42:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:42:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:42:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:42:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:42:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:42:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:42:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:42:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:42:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:42:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:42:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 03:42:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-29 03:42:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2023-11-29 03:42:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2023-11-29 03:42:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2023-11-29 03:42:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2719 backedges. 72 proven. 1585 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2023-11-29 03:42:12,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:12,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400742573] [2023-11-29 03:42:12,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400742573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:12,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75684730] [2023-11-29 03:42:12,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:42:12,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:12,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:12,494 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:12,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-11-29 03:42:13,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:42:13,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:13,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 118 conjunts are in the unsatisfiable core [2023-11-29 03:42:13,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:15,301 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 03:42:17,425 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 22 treesize of output 10 [2023-11-29 03:42:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2719 backedges. 72 proven. 1585 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2023-11-29 03:42:17,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:18,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 03:42:18,486 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 23 treesize of output 19 [2023-11-29 03:42:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2719 backedges. 72 proven. 1585 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2023-11-29 03:42:18,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75684730] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:18,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:18,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 56, 55] total 111 [2023-11-29 03:42:18,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860782498] [2023-11-29 03:42:18,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:18,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2023-11-29 03:42:18,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:18,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2023-11-29 03:42:18,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=11753, Unknown=0, NotChecked=0, Total=12210 [2023-11-29 03:42:18,912 INFO L87 Difference]: Start difference. First operand 238 states and 241 transitions. Second operand has 111 states, 109 states have (on average 2.311926605504587) internal successors, (252), 106 states have internal predecessors, (252), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (50), 50 states have call predecessors, (50), 49 states have call successors, (50) [2023-11-29 03:42:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:42:27,099 INFO L93 Difference]: Finished difference Result 326 states and 332 transitions. [2023-11-29 03:42:27,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-11-29 03:42:27,099 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 109 states have (on average 2.311926605504587) internal successors, (252), 106 states have internal predecessors, (252), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (50), 50 states have call predecessors, (50), 49 states have call successors, (50) Word has length 245 [2023-11-29 03:42:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:42:27,101 INFO L225 Difference]: With dead ends: 326 [2023-11-29 03:42:27,101 INFO L226 Difference]: Without dead ends: 324 [2023-11-29 03:42:27,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 460 SyntacticMatches, 24 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11294 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1418, Invalid=33738, Unknown=0, NotChecked=0, Total=35156 [2023-11-29 03:42:27,103 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 465 mSDsluCounter, 2906 mSDsCounter, 0 mSdLazyCounter, 9156 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 2964 SdHoareTripleChecker+Invalid, 9284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 9156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:42:27,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 2964 Invalid, 9284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 9156 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-29 03:42:27,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-29 03:42:27,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 245. [2023-11-29 03:42:27,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 195 states have (on average 1.0153846153846153) internal successors, (198), 195 states have internal predecessors, (198), 26 states have call successors, (26), 23 states have call predecessors, (26), 23 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-29 03:42:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 250 transitions. [2023-11-29 03:42:27,304 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 250 transitions. Word has length 245 [2023-11-29 03:42:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:42:27,304 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 250 transitions. [2023-11-29 03:42:27,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 109 states have (on average 2.311926605504587) internal successors, (252), 106 states have internal predecessors, (252), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (50), 50 states have call predecessors, (50), 49 states have call successors, (50) [2023-11-29 03:42:27,305 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 250 transitions. [2023-11-29 03:42:27,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-11-29 03:42:27,306 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:42:27,306 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:27,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-11-29 03:42:27,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-11-29 03:42:27,506 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:42:27,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:27,507 INFO L85 PathProgramCache]: Analyzing trace with hash 776837204, now seen corresponding path program 65 times [2023-11-29 03:42:27,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:27,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594536164] [2023-11-29 03:42:27,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:27,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:42:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:42:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:42:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:42:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:42:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:42:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:42:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:42:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:42:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:42:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:42:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:42:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:42:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:42:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:42:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:42:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:42:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:42:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:42:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:42:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 03:42:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-29 03:42:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2023-11-29 03:42:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2023-11-29 03:42:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2023-11-29 03:42:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 738 proven. 849 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-29 03:42:29,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:29,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594536164] [2023-11-29 03:42:29,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594536164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:29,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852738714] [2023-11-29 03:42:29,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:42:29,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:29,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:29,051 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:29,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-11-29 03:42:30,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-11-29 03:42:30,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:30,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 03:42:30,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 805 proven. 782 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-29 03:42:31,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 805 proven. 782 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-29 03:42:32,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852738714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:32,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:32,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 77 [2023-11-29 03:42:32,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965481715] [2023-11-29 03:42:32,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:32,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-29 03:42:32,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:32,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-29 03:42:32,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=4497, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 03:42:32,221 INFO L87 Difference]: Start difference. First operand 245 states and 250 transitions. Second operand has 77 states, 77 states have (on average 2.6493506493506493) internal successors, (204), 77 states have internal predecessors, (204), 25 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2023-11-29 03:42:33,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:42:33,157 INFO L93 Difference]: Finished difference Result 330 states and 336 transitions. [2023-11-29 03:42:33,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 03:42:33,157 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.6493506493506493) internal successors, (204), 77 states have internal predecessors, (204), 25 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) Word has length 248 [2023-11-29 03:42:33,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:42:33,158 INFO L225 Difference]: With dead ends: 330 [2023-11-29 03:42:33,159 INFO L226 Difference]: Without dead ends: 254 [2023-11-29 03:42:33,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 473 SyntacticMatches, 47 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4673 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2327, Invalid=7773, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 03:42:33,159 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 224 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:42:33,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 301 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:42:33,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-11-29 03:42:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 241. [2023-11-29 03:42:33,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 states have internal predecessors, (193), 26 states have call successors, (26), 23 states have call predecessors, (26), 23 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-29 03:42:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 245 transitions. [2023-11-29 03:42:33,304 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 245 transitions. Word has length 248 [2023-11-29 03:42:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:42:33,304 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 245 transitions. [2023-11-29 03:42:33,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.6493506493506493) internal successors, (204), 77 states have internal predecessors, (204), 25 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2023-11-29 03:42:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 245 transitions. [2023-11-29 03:42:33,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-29 03:42:33,306 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:42:33,306 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 24, 24, 24, 24, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:33,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-11-29 03:42:33,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-11-29 03:42:33,506 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:42:33,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:33,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1578064398, now seen corresponding path program 66 times [2023-11-29 03:42:33,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:33,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336575231] [2023-11-29 03:42:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:33,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 03:42:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 03:42:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 03:42:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 03:42:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 03:42:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 03:42:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 03:42:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 03:42:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 03:42:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 03:42:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 03:42:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 03:42:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 03:42:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 03:42:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 03:42:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 03:42:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 03:42:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 03:42:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-29 03:42:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 03:42:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 03:42:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-29 03:42:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2023-11-29 03:42:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2023-11-29 03:42:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2023-11-29 03:42:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2023-11-29 03:42:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 72 proven. 1661 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2023-11-29 03:42:36,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:36,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336575231] [2023-11-29 03:42:36,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336575231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:36,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324582589] [2023-11-29 03:42:36,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:42:36,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:36,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:36,377 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:36,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2ea0ce1-388f-499a-8a5b-7f6767ebc60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-11-29 03:42:38,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2023-11-29 03:42:38,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:38,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 114 conjunts are in the unsatisfiable core [2023-11-29 03:42:38,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:40,501 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 03:42:40,853 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 03:42:40,853 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 42 treesize of output 16 [2023-11-29 03:42:42,847 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 28 treesize of output 10 [2023-11-29 03:42:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 166 proven. 1661 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2023-11-29 03:42:42,913 INFO L327 TraceCheckSpWp]: Computing backward predicates...