./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/insertion_sort-2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/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_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/insertion_sort-2-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/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_f86accfe-566e-460e-9475-48836cec85fe/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 f08b02f494e898be2e8c5098de245f701022f3f8b39ac6682b3bca3a03512826 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:31:38,858 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:31:38,922 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 23:31:38,926 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:31:38,927 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:31:38,949 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:31:38,950 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:31:38,950 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:31:38,951 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:31:38,952 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:31:38,952 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:31:38,953 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:31:38,953 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:31:38,954 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:31:38,954 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:31:38,955 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:31:38,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 23:31:38,956 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:31:38,956 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:31:38,957 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:31:38,957 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:31:38,958 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 23:31:38,959 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:31:38,959 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 23:31:38,959 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:31:38,960 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 23:31:38,960 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:31:38,961 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:31:38,961 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:31:38,961 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:31:38,962 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:31:38,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:31:38,962 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:31:38,963 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:31:38,963 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 23:31:38,963 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:31:38,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:31:38,964 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:31:38,964 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:31:38,964 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 23:31:38,964 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:31:38,964 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:31:38,965 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_f86accfe-566e-460e-9475-48836cec85fe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f08b02f494e898be2e8c5098de245f701022f3f8b39ac6682b3bca3a03512826 [2023-11-28 23:31:39,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:31:39,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:31:39,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:31:39,209 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:31:39,210 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:31:39,211 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loops/insertion_sort-2-2.c [2023-11-28 23:31:41,906 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:31:42,079 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:31:42,079 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/sv-benchmarks/c/loops/insertion_sort-2-2.c [2023-11-28 23:31:42,085 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/data/d36ad8843/cdf0d6d32cc049e9a51a4f161e08284d/FLAGbe9784232 [2023-11-28 23:31:42,096 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/data/d36ad8843/cdf0d6d32cc049e9a51a4f161e08284d [2023-11-28 23:31:42,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:31:42,099 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:31:42,100 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:31:42,100 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:31:42,104 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:31:42,105 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:31:42" (1/1) ... [2023-11-28 23:31:42,106 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68c4768a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:31:42, skipping insertion in model container [2023-11-28 23:31:42,106 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:31:42" (1/1) ... [2023-11-28 23:31:42,125 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:31:42,236 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_f86accfe-566e-460e-9475-48836cec85fe/sv-benchmarks/c/loops/insertion_sort-2-2.c[330,343] [2023-11-28 23:31:42,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:31:42,266 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:31:42,279 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_f86accfe-566e-460e-9475-48836cec85fe/sv-benchmarks/c/loops/insertion_sort-2-2.c[330,343] [2023-11-28 23:31:42,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:31:42,303 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:31:42,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:31:42 WrapperNode [2023-11-28 23:31:42,303 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:31:42,304 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:31:42,305 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:31:42,305 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:31:42,312 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:31:42" (1/1) ... [2023-11-28 23:31:42,319 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:31:42" (1/1) ... [2023-11-28 23:31:42,340 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-11-28 23:31:42,340 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:31:42,341 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:31:42,341 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:31:42,342 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:31:42,353 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:31:42" (1/1) ... [2023-11-28 23:31:42,353 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:31:42" (1/1) ... [2023-11-28 23:31:42,356 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:31:42" (1/1) ... [2023-11-28 23:31:42,369 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2023-11-28 23:31:42,369 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:31:42" (1/1) ... [2023-11-28 23:31:42,370 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:31:42" (1/1) ... [2023-11-28 23:31:42,375 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:31:42" (1/1) ... [2023-11-28 23:31:42,379 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:31:42" (1/1) ... [2023-11-28 23:31:42,380 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:31:42" (1/1) ... [2023-11-28 23:31:42,382 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:31:42" (1/1) ... [2023-11-28 23:31:42,384 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:31:42,385 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:31:42,385 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:31:42,385 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:31:42,386 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:31:42" (1/1) ... [2023-11-28 23:31:42,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:31:42,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:31:42,420 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:31:42,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:31:42,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:31:42,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:31:42,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 23:31:42,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 23:31:42,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 23:31:42,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 23:31:42,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:31:42,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:31:42,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 23:31:42,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 23:31:42,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 23:31:42,525 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:31:42,527 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:31:42,669 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:31:42,695 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:31:42,695 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-28 23:31:42,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:31:42 BoogieIcfgContainer [2023-11-28 23:31:42,696 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:31:42,699 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:31:42,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:31:42,702 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:31:42,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:31:42" (1/3) ... [2023-11-28 23:31:42,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62283792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:31:42, skipping insertion in model container [2023-11-28 23:31:42,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:31:42" (2/3) ... [2023-11-28 23:31:42,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62283792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:31:42, skipping insertion in model container [2023-11-28 23:31:42,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:31:42" (3/3) ... [2023-11-28 23:31:42,705 INFO L112 eAbstractionObserver]: Analyzing ICFG insertion_sort-2-2.c [2023-11-28 23:31:42,724 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:31:42,724 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 23:31:42,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:31:42,774 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;@1d5659bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:31:42,775 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 23:31:42,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-28 23:31:42,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:31:42,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:31:42,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:31:42,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:31:42,792 INFO L85 PathProgramCache]: Analyzing trace with hash 438010954, now seen corresponding path program 1 times [2023-11-28 23:31:42,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:31:42,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726771325] [2023-11-28 23:31:42,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:31:42,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:31:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:31:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:31:42,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:31:42,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726771325] [2023-11-28 23:31:42,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726771325] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:31:42,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:31:42,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:31:42,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970925724] [2023-11-28 23:31:42,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:31:42,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 23:31:42,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:31:42,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 23:31:42,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 23:31:42,988 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:31:43,012 INFO L93 Difference]: Finished difference Result 33 states and 50 transitions. [2023-11-28 23:31:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 23:31:43,014 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-28 23:31:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:31:43,022 INFO L225 Difference]: With dead ends: 33 [2023-11-28 23:31:43,022 INFO L226 Difference]: Without dead ends: 15 [2023-11-28 23:31:43,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 23:31:43,029 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:31:43,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:31:43,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-28 23:31:43,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-28 23:31:43,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2023-11-28 23:31:43,081 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 9 [2023-11-28 23:31:43,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:31:43,081 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2023-11-28 23:31:43,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:43,082 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2023-11-28 23:31:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-28 23:31:43,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:31:43,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:31:43,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 23:31:43,083 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:31:43,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:31:43,084 INFO L85 PathProgramCache]: Analyzing trace with hash -616055382, now seen corresponding path program 1 times [2023-11-28 23:31:43,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:31:43,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995979] [2023-11-28 23:31:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:31:43,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:31:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:31:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:31:43,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:31:43,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995979] [2023-11-28 23:31:43,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:31:43,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:31:43,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:31:43,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323778133] [2023-11-28 23:31:43,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:31:43,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:31:43,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:31:43,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:31:43,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:31:43,319 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:43,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:31:43,382 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2023-11-28 23:31:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:31:43,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-28 23:31:43,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:31:43,384 INFO L225 Difference]: With dead ends: 27 [2023-11-28 23:31:43,384 INFO L226 Difference]: Without dead ends: 20 [2023-11-28 23:31:43,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:31:43,386 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:31:43,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 33 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:31:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-28 23:31:43,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2023-11-28 23:31:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-28 23:31:43,393 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2023-11-28 23:31:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:31:43,393 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-28 23:31:43,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-28 23:31:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-28 23:31:43,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:31:43,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:31:43,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 23:31:43,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:31:43,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:31:43,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1413316211, now seen corresponding path program 1 times [2023-11-28 23:31:43,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:31:43,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670251899] [2023-11-28 23:31:43,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:31:43,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:31:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:31:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:31:43,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:31:43,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670251899] [2023-11-28 23:31:43,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670251899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:31:43,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:31:43,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:31:43,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895039218] [2023-11-28 23:31:43,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:31:43,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:31:43,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:31:43,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:31:43,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:31:43,571 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:31:43,623 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2023-11-28 23:31:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:31:43,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-28 23:31:43,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:31:43,625 INFO L225 Difference]: With dead ends: 30 [2023-11-28 23:31:43,625 INFO L226 Difference]: Without dead ends: 17 [2023-11-28 23:31:43,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-28 23:31:43,627 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:31:43,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 43 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:31:43,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-28 23:31:43,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-28 23:31:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-28 23:31:43,632 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 14 [2023-11-28 23:31:43,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:31:43,632 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-28 23:31:43,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-28 23:31:43,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-28 23:31:43,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:31:43,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:31:43,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 23:31:43,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:31:43,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:31:43,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1764545412, now seen corresponding path program 1 times [2023-11-28 23:31:43,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:31:43,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662586680] [2023-11-28 23:31:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:31:43,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:31:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:31:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:31:43,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:31:43,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662586680] [2023-11-28 23:31:43,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662586680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:31:43,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028106586] [2023-11-28 23:31:43,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:31:43,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:31:43,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:31:43,809 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:31:43,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 23:31:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:31:43,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 23:31:43,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:31:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:31:43,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:31:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:31:44,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028106586] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:31:44,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:31:44,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-28 23:31:44,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532173636] [2023-11-28 23:31:44,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:31:44,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 23:31:44,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:31:44,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 23:31:44,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-28 23:31:44,023 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:44,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:31:44,086 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2023-11-28 23:31:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 23:31:44,086 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-28 23:31:44,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:31:44,087 INFO L225 Difference]: With dead ends: 35 [2023-11-28 23:31:44,087 INFO L226 Difference]: Without dead ends: 22 [2023-11-28 23:31:44,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-28 23:31:44,089 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:31:44,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 59 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:31:44,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-28 23:31:44,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2023-11-28 23:31:44,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:44,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-28 23:31:44,094 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2023-11-28 23:31:44,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:31:44,094 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-28 23:31:44,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:44,094 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-28 23:31:44,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-28 23:31:44,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:31:44,095 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:31:44,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 23:31:44,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:31:44,297 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:31:44,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:31:44,297 INFO L85 PathProgramCache]: Analyzing trace with hash -232251245, now seen corresponding path program 2 times [2023-11-28 23:31:44,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:31:44,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098143932] [2023-11-28 23:31:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:31:44,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:31:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:31:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:31:44,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:31:44,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098143932] [2023-11-28 23:31:44,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098143932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:31:44,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179583413] [2023-11-28 23:31:44,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:31:44,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:31:44,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:31:44,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:31:44,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 23:31:45,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:31:45,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:31:45,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-28 23:31:45,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:31:45,105 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 [2023-11-28 23:31:45,128 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 [2023-11-28 23:31:45,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-28 23:31:45,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:31:45,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-28 23:31:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:31:45,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:31:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 23:31:45,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179583413] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 23:31:45,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:31:45,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12, 13] total 26 [2023-11-28 23:31:45,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567697047] [2023-11-28 23:31:45,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:31:45,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 23:31:45,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:31:45,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 23:31:45,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2023-11-28 23:31:45,731 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:50,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:31:53,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:31:53,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:31:53,708 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2023-11-28 23:31:53,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-28 23:31:53,709 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-28 23:31:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:31:53,711 INFO L225 Difference]: With dead ends: 53 [2023-11-28 23:31:53,711 INFO L226 Difference]: Without dead ends: 51 [2023-11-28 23:31:53,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2023-11-28 23:31:53,713 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:31:53,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 66 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2023-11-28 23:31:53,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-28 23:31:53,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2023-11-28 23:31:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2023-11-28 23:31:53,723 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 16 [2023-11-28 23:31:53,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:31:53,723 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2023-11-28 23:31:53,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:53,724 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2023-11-28 23:31:53,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-28 23:31:53,725 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:31:53,725 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:31:53,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 23:31:53,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:31:53,931 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:31:53,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:31:53,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1041597871, now seen corresponding path program 1 times [2023-11-28 23:31:53,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:31:53,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261515768] [2023-11-28 23:31:53,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:31:53,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:31:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:31:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 23:31:53,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:31:53,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261515768] [2023-11-28 23:31:53,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261515768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:31:53,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:31:53,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:31:53,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882725886] [2023-11-28 23:31:53,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:31:53,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:31:53,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:31:53,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:31:53,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:31:53,991 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:54,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:31:54,044 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2023-11-28 23:31:54,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:31:54,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-28 23:31:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:31:54,046 INFO L225 Difference]: With dead ends: 61 [2023-11-28 23:31:54,046 INFO L226 Difference]: Without dead ends: 39 [2023-11-28 23:31:54,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-28 23:31:54,048 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:31:54,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 32 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:31:54,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-28 23:31:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2023-11-28 23:31:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2023-11-28 23:31:54,058 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 16 [2023-11-28 23:31:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:31:54,059 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2023-11-28 23:31:54,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:54,059 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2023-11-28 23:31:54,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-28 23:31:54,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:31:54,060 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:31:54,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 23:31:54,060 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:31:54,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:31:54,061 INFO L85 PathProgramCache]: Analyzing trace with hash 200630979, now seen corresponding path program 1 times [2023-11-28 23:31:54,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:31:54,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499512011] [2023-11-28 23:31:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:31:54,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:31:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:31:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:31:54,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:31:54,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499512011] [2023-11-28 23:31:54,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499512011] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:31:54,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900871840] [2023-11-28 23:31:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:31:54,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:31:54,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:31:54,244 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:31:54,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 23:31:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:31:54,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 23:31:54,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:31:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:31:54,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:31:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:31:54,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900871840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:31:54,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:31:54,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-11-28 23:31:54,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542857056] [2023-11-28 23:31:54,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:31:54,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 23:31:54,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:31:54,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 23:31:54,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-28 23:31:54,611 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:31:54,779 INFO L93 Difference]: Finished difference Result 95 states and 129 transitions. [2023-11-28 23:31:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 23:31:54,780 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-28 23:31:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:31:54,781 INFO L225 Difference]: With dead ends: 95 [2023-11-28 23:31:54,781 INFO L226 Difference]: Without dead ends: 66 [2023-11-28 23:31:54,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-11-28 23:31:54,782 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:31:54,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 114 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:31:54,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-28 23:31:54,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2023-11-28 23:31:54,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2023-11-28 23:31:54,797 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 19 [2023-11-28 23:31:54,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:31:54,797 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2023-11-28 23:31:54,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2023-11-28 23:31:54,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-28 23:31:54,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:31:54,799 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:31:54,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 23:31:54,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-28 23:31:54,999 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:31:55,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:31:55,000 INFO L85 PathProgramCache]: Analyzing trace with hash 973872331, now seen corresponding path program 1 times [2023-11-28 23:31:55,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:31:55,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503379920] [2023-11-28 23:31:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:31:55,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:31:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:31:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:31:55,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:31:55,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503379920] [2023-11-28 23:31:55,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503379920] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:31:55,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978769119] [2023-11-28 23:31:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:31:55,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:31:55,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:31:55,702 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:31:55,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 23:31:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:31:55,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-28 23:31:55,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:31:55,888 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 0 case distinctions, treesize of input 42 treesize of output 22 [2023-11-28 23:31:56,025 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:31:56,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2023-11-28 23:31:56,102 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:31:56,103 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 32 treesize of output 12 [2023-11-28 23:31:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 23:31:56,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:31:56,402 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 72 treesize of output 64 [2023-11-28 23:31:56,418 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-11-28 23:31:56,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 574 treesize of output 514 [2023-11-28 23:31:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 23:31:56,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978769119] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:31:56,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:31:56,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 31 [2023-11-28 23:31:56,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471216626] [2023-11-28 23:31:56,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:31:56,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-28 23:31:56,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:31:56,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-28 23:31:56,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2023-11-28 23:31:56,493 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:58,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:31:58,485 INFO L93 Difference]: Finished difference Result 131 states and 175 transitions. [2023-11-28 23:31:58,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-28 23:31:58,486 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-28 23:31:58,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:31:58,487 INFO L225 Difference]: With dead ends: 131 [2023-11-28 23:31:58,487 INFO L226 Difference]: Without dead ends: 79 [2023-11-28 23:31:58,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=688, Invalid=3602, Unknown=0, NotChecked=0, Total=4290 [2023-11-28 23:31:58,490 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 177 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 23:31:58,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 149 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 23:31:58,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-28 23:31:58,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 33. [2023-11-28 23:31:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-11-28 23:31:58,501 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 19 [2023-11-28 23:31:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:31:58,501 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-11-28 23:31:58,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:31:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-11-28 23:31:58,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-28 23:31:58,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:31:58,502 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:31:58,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-28 23:31:58,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:31:58,708 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:31:58,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:31:58,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1154291357, now seen corresponding path program 2 times [2023-11-28 23:31:58,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:31:58,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569335384] [2023-11-28 23:31:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:31:58,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:31:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:31:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:31:59,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:31:59,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569335384] [2023-11-28 23:31:59,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569335384] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:31:59,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837214621] [2023-11-28 23:31:59,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:31:59,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:31:59,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:31:59,336 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:31:59,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 23:31:59,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:31:59,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:31:59,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-28 23:31:59,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:31:59,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-28 23:31:59,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:31:59,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-28 23:31:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:31:59,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:31:59,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2023-11-28 23:31:59,891 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2023-11-28 23:31:59,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 58 [2023-11-28 23:31:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 23:31:59,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837214621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:31:59,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:31:59,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 26 [2023-11-28 23:31:59,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670135129] [2023-11-28 23:31:59,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:31:59,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 23:31:59,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:31:59,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 23:31:59,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2023-11-28 23:31:59,918 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:32:00,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:32:00,568 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2023-11-28 23:32:00,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-28 23:32:00,568 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-28 23:32:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:32:00,569 INFO L225 Difference]: With dead ends: 88 [2023-11-28 23:32:00,569 INFO L226 Difference]: Without dead ends: 86 [2023-11-28 23:32:00,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=1637, Unknown=0, NotChecked=0, Total=1980 [2023-11-28 23:32:00,571 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 178 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:32:00,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 199 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:32:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-28 23:32:00,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2023-11-28 23:32:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.34) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:32:00,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2023-11-28 23:32:00,592 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 25 [2023-11-28 23:32:00,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:32:00,593 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2023-11-28 23:32:00,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:32:00,593 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2023-11-28 23:32:00,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-28 23:32:00,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:32:00,594 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:32:00,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 23:32:00,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:32:00,800 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:32:00,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:32:00,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1990801529, now seen corresponding path program 3 times [2023-11-28 23:32:00,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:32:00,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129886812] [2023-11-28 23:32:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:32:00,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:32:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:32:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-28 23:32:01,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:32:01,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129886812] [2023-11-28 23:32:01,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129886812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:32:01,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011444438] [2023-11-28 23:32:01,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:32:01,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:32:01,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:32:01,033 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:32:01,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 23:32:01,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 23:32:01,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:32:01,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 23:32:01,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:32:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-28 23:32:01,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:32:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-28 23:32:01,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011444438] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:32:01,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:32:01,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2023-11-28 23:32:01,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141908040] [2023-11-28 23:32:01,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:32:01,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-28 23:32:01,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:32:01,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-28 23:32:01,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-28 23:32:01,592 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:32:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:32:01,913 INFO L93 Difference]: Finished difference Result 150 states and 203 transitions. [2023-11-28 23:32:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 23:32:01,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-28 23:32:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:32:01,915 INFO L225 Difference]: With dead ends: 150 [2023-11-28 23:32:01,915 INFO L226 Difference]: Without dead ends: 113 [2023-11-28 23:32:01,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-11-28 23:32:01,916 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 48 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:32:01,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 238 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 23:32:01,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-28 23:32:01,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2023-11-28 23:32:01,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.3298969072164948) internal successors, (129), 97 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:32:01,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2023-11-28 23:32:01,957 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 28 [2023-11-28 23:32:01,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:32:01,957 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2023-11-28 23:32:01,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:32:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2023-11-28 23:32:01,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-28 23:32:01,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:32:01,959 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:32:01,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-28 23:32:02,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:32:02,165 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:32:02,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:32:02,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1281721361, now seen corresponding path program 1 times [2023-11-28 23:32:02,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:32:02,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074461004] [2023-11-28 23:32:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:32:02,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:32:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:32:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:32:02,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:32:02,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074461004] [2023-11-28 23:32:02,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074461004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:32:02,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886729427] [2023-11-28 23:32:02,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:32:02,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:32:02,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:32:02,643 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:32:02,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 23:32:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:32:02,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-28 23:32:02,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:32:02,878 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 36 treesize of output 20 [2023-11-28 23:32:03,020 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:32:03,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2023-11-28 23:32:03,157 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:32:03,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2023-11-28 23:32:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:32:03,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:32:03,439 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 74 treesize of output 66 [2023-11-28 23:32:03,458 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-11-28 23:32:03,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 494 treesize of output 426 [2023-11-28 23:32:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 23:32:03,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886729427] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:32:03,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:32:03,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2023-11-28 23:32:03,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163676450] [2023-11-28 23:32:03,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:32:03,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-28 23:32:03,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:32:03,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-28 23:32:03,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2023-11-28 23:32:03,657 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:32:05,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:32:05,777 INFO L93 Difference]: Finished difference Result 208 states and 266 transitions. [2023-11-28 23:32:05,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-28 23:32:05,778 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-28 23:32:05,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:32:05,779 INFO L225 Difference]: With dead ends: 208 [2023-11-28 23:32:05,779 INFO L226 Difference]: Without dead ends: 137 [2023-11-28 23:32:05,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=901, Invalid=5579, Unknown=0, NotChecked=0, Total=6480 [2023-11-28 23:32:05,783 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 180 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 23:32:05,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 250 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 23:32:05,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-28 23:32:05,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 89. [2023-11-28 23:32:05,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2613636363636365) internal successors, (111), 88 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:32:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2023-11-28 23:32:05,814 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 28 [2023-11-28 23:32:05,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:32:05,814 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2023-11-28 23:32:05,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:32:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2023-11-28 23:32:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-28 23:32:05,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:32:05,816 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:32:05,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 23:32:06,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:32:06,022 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:32:06,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:32:06,022 INFO L85 PathProgramCache]: Analyzing trace with hash 226861791, now seen corresponding path program 1 times [2023-11-28 23:32:06,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:32:06,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183852380] [2023-11-28 23:32:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:32:06,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:32:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:32:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:32:07,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:32:07,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183852380] [2023-11-28 23:32:07,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183852380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:32:07,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558703443] [2023-11-28 23:32:07,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:32:07,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:32:07,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:32:07,523 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:32:07,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 23:32:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:32:07,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-28 23:32:07,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:32:07,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-28 23:32:07,771 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:32:07,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2023-11-28 23:32:07,874 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:32:07,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 28 [2023-11-28 23:32:08,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:32:08,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:32:08,069 INFO L349 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-11-28 23:32:08,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 34 [2023-11-28 23:32:08,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:32:08,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-28 23:32:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:32:08,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:32:13,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 104 [2023-11-28 23:32:13,056 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:32:13,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 7234 treesize of output 6769 [2023-11-28 23:32:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 23:32:18,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558703443] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:32:18,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:32:18,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 18] total 46 [2023-11-28 23:32:18,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595849608] [2023-11-28 23:32:18,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:32:18,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-28 23:32:18,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:32:18,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-28 23:32:18,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1801, Unknown=2, NotChecked=0, Total=2070 [2023-11-28 23:32:18,625 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:32:23,783 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse4 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 4)) (.cse5 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 8)) (.cse1 (select |c_#memory_int#1| |c_ULTIMATE.start_main_~#v~0#1.base|)) (.cse6 (+ .cse2 |c_ULTIMATE.start_main_~#v~0#1.offset| 4))) (and (let ((.cse0 (store .cse1 (+ .cse2 4) |c_ULTIMATE.start_main_~key~0#1|))) (<= (select .cse0 4) (select .cse0 8))) (forall ((|ULTIMATE.start_main_~key~0#1| Int)) (let ((.cse3 (store .cse1 .cse6 |ULTIMATE.start_main_~key~0#1|))) (< (select .cse3 .cse4) (+ (select .cse3 .cse5) 1)))) (<= (select .cse1 4) (select .cse1 8)) (= |c_ULTIMATE.start_main_~#v~0#1.offset| 0) (or (< |c_ULTIMATE.start_main_~j~0#1| 1) (forall ((v_ArrVal_202 Int) (v_ArrVal_201 Int)) (let ((.cse9 (* |c_ULTIMATE.start_main_~j~0#1| 4))) (let ((.cse8 (store .cse1 .cse6 |c_ULTIMATE.start_main_~key~0#1|)) (.cse10 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| .cse9))) (or (let ((.cse7 (store (store .cse8 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| .cse9 4) v_ArrVal_201) .cse10 v_ArrVal_202))) (< (select .cse7 .cse4) (+ (select .cse7 .cse5) 1))) (< (select .cse8 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| (- 4) .cse9)) v_ArrVal_202) (< v_ArrVal_201 (select .cse8 .cse10)))))))))) is different from false [2023-11-28 23:32:27,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:32:31,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:32:35,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:32:39,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:32:43,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:32:47,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:32:52,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:32:56,089 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int#1| |c_ULTIMATE.start_main_~#v~0#1.base|))) (let ((.cse6 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse2 (select .cse1 8)) (.cse4 (not |c_ULTIMATE.start_main_#t~short10#1|)) (.cse0 (= |c_ULTIMATE.start_main_~j~0#1| 2)) (.cse3 (= |c_ULTIMATE.start_main_~i~0#1| 0))) (and .cse0 (or (and (<= (select .cse1 0) .cse2) .cse3) .cse4) (let ((.cse5 (store .cse1 (+ .cse6 4) |c_ULTIMATE.start_main_~key~0#1|))) (<= (select .cse5 4) (select .cse5 8))) (forall ((|ULTIMATE.start_main_~key~0#1| Int)) (let ((.cse7 (store .cse1 (+ .cse6 |c_ULTIMATE.start_main_~#v~0#1.offset| 4) |ULTIMATE.start_main_~key~0#1|))) (< (select .cse7 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 4)) (+ (select .cse7 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 8)) 1)))) (<= (select .cse1 4) .cse2) (or .cse4 (< |c_ULTIMATE.start_main_~j~0#1| 1) (let ((.cse8 (= |c_ULTIMATE.start_main_~j~0#1| 1))) (and (or (and (not .cse0) (= |c_ULTIMATE.start_main_~i~0#1| 1)) .cse8) (or .cse3 (not .cse8))))) (= |c_ULTIMATE.start_main_~#v~0#1.offset| 0)))) is different from false [2023-11-28 23:33:58,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:34:02,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:34:06,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:34:10,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:34:14,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:35:11,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:35:16,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:35:20,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:35:24,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:35:28,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:35:32,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:35:36,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:35:40,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:35:44,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:35:48,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:35:52,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:35:56,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:36:00,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:36:09,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:36:13,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:36:17,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:36:21,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:36:25,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:36:29,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:36:33,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:36:37,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:36:41,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:36:45,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:36:49,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:36:53,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:36:57,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:37:02,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:37:06,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:37:10,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:37:14,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:37:18,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:37:22,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:37:26,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:37:30,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:37:34,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:37:38,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:37:42,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:37:46,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:37:50,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:37:54,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:38:31,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:38:35,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:38:39,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:38:43,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:38:47,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:38:51,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:39:07,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:39:12,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:39:16,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:39:20,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:39:24,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:39:28,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:39:32,112 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse1 (select |c_#memory_int#1| |c_ULTIMATE.start_main_~#v~0#1.base|))) (and (let ((.cse0 (store .cse1 (+ .cse2 4) |c_ULTIMATE.start_main_~key~0#1|))) (<= (select .cse0 4) (select .cse0 8))) (not (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) (forall ((|ULTIMATE.start_main_~key~0#1| Int)) (let ((.cse3 (store .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#v~0#1.offset| 4) |ULTIMATE.start_main_~key~0#1|))) (< (select .cse3 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 4)) (+ (select .cse3 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 8)) 1)))) (<= (select .cse1 4) (select .cse1 8)) (= |c_ULTIMATE.start_main_~k~0#1| 1) (= |c_ULTIMATE.start_main_~#v~0#1.offset| 0))) is different from false [2023-11-28 23:39:36,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:40:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:22,731 INFO L93 Difference]: Finished difference Result 272 states and 338 transitions. [2023-11-28 23:40:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-28 23:40:22,732 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-28 23:40:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:22,733 INFO L225 Difference]: With dead ends: 272 [2023-11-28 23:40:22,733 INFO L226 Difference]: Without dead ends: 201 [2023-11-28 23:40:22,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 228.1s TimeCoverageRelationStatistics Valid=1181, Invalid=7537, Unknown=36, NotChecked=558, Total=9312 [2023-11-28 23:40:22,736 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 226 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 85 mSolverCounterUnsat, 65 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 263.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 65 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 265.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:22,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 355 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1189 Invalid, 65 Unknown, 127 Unchecked, 265.3s Time] [2023-11-28 23:40:22,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-28 23:40:22,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 109. [2023-11-28 23:40:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.2407407407407407) internal successors, (134), 108 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2023-11-28 23:40:22,768 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 31 [2023-11-28 23:40:22,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:22,768 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2023-11-28 23:40:22,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2023-11-28 23:40:22,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-28 23:40:22,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:22,770 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:22,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 23:40:22,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-28 23:40:22,971 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:22,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:22,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1709509395, now seen corresponding path program 4 times [2023-11-28 23:40:22,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:22,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717256599] [2023-11-28 23:40:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:22,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:40:23,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:23,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717256599] [2023-11-28 23:40:23,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717256599] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:40:23,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852985333] [2023-11-28 23:40:23,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 23:40:23,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:23,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:23,958 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:23,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 23:40:24,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 23:40:24,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:40:24,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-28 23:40:24,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:24,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-28 23:40:24,298 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:40:24,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-28 23:40:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:40:24,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:40:24,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2023-11-28 23:40:24,648 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2023-11-28 23:40:24,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 58 [2023-11-28 23:40:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 23:40:24,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852985333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:40:24,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:40:24,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 13] total 27 [2023-11-28 23:40:24,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783348290] [2023-11-28 23:40:24,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:40:24,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-28 23:40:24,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:24,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-28 23:40:24,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2023-11-28 23:40:24,794 INFO L87 Difference]: Start difference. First operand 109 states and 134 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:26,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:26,668 INFO L93 Difference]: Finished difference Result 217 states and 268 transitions. [2023-11-28 23:40:26,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-28 23:40:26,668 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-28 23:40:26,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:26,670 INFO L225 Difference]: With dead ends: 217 [2023-11-28 23:40:26,670 INFO L226 Difference]: Without dead ends: 215 [2023-11-28 23:40:26,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=428, Invalid=2434, Unknown=0, NotChecked=0, Total=2862 [2023-11-28 23:40:26,672 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 235 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:26,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 338 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-28 23:40:26,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-28 23:40:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 146. [2023-11-28 23:40:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.296551724137931) internal successors, (188), 145 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:26,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 188 transitions. [2023-11-28 23:40:26,721 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 188 transitions. Word has length 34 [2023-11-28 23:40:26,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:26,721 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 188 transitions. [2023-11-28 23:40:26,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:26,721 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 188 transitions. [2023-11-28 23:40:26,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-28 23:40:26,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:26,722 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:26,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 23:40:26,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-28 23:40:26,923 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:26,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:26,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1563013495, now seen corresponding path program 2 times [2023-11-28 23:40:26,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:26,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311372525] [2023-11-28 23:40:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:26,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:40:27,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:27,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311372525] [2023-11-28 23:40:27,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311372525] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:40:27,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755272929] [2023-11-28 23:40:27,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:40:27,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:27,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:27,970 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:27,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 23:40:28,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:40:28,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:40:28,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-28 23:40:28,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:28,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-28 23:40:28,905 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:40:28,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-28 23:40:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 23:40:28,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:40:29,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2023-11-28 23:40:29,244 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2023-11-28 23:40:29,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 58 [2023-11-28 23:40:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 23:40:29,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755272929] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:40:29,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:40:29,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 13] total 33 [2023-11-28 23:40:29,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634077902] [2023-11-28 23:40:29,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:40:29,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-28 23:40:29,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:29,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-28 23:40:29,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2023-11-28 23:40:29,298 INFO L87 Difference]: Start difference. First operand 146 states and 188 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:31,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:40:31,550 INFO L93 Difference]: Finished difference Result 341 states and 430 transitions. [2023-11-28 23:40:31,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-28 23:40:31,550 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-28 23:40:31,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:40:31,553 INFO L225 Difference]: With dead ends: 341 [2023-11-28 23:40:31,553 INFO L226 Difference]: Without dead ends: 339 [2023-11-28 23:40:31,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=651, Invalid=4899, Unknown=0, NotChecked=0, Total=5550 [2023-11-28 23:40:31,556 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 399 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:40:31,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 308 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-28 23:40:31,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-11-28 23:40:31,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 154. [2023-11-28 23:40:31,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.3137254901960784) internal successors, (201), 153 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:31,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 201 transitions. [2023-11-28 23:40:31,615 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 201 transitions. Word has length 34 [2023-11-28 23:40:31,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:40:31,615 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 201 transitions. [2023-11-28 23:40:31,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:31,615 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 201 transitions. [2023-11-28 23:40:31,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-28 23:40:31,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:40:31,617 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:31,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 23:40:31,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 23:40:31,817 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:40:31,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:31,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2072997547, now seen corresponding path program 2 times [2023-11-28 23:40:31,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:31,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411062340] [2023-11-28 23:40:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:31,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:40:33,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:33,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411062340] [2023-11-28 23:40:33,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411062340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:40:33,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363027650] [2023-11-28 23:40:33,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:40:33,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:40:33,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:33,190 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:40:33,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 23:40:33,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:40:33,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:40:33,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-28 23:40:33,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:40:33,437 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 36 treesize of output 20 [2023-11-28 23:40:33,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:40:33,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2023-11-28 23:40:33,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:40:33,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2023-11-28 23:40:33,986 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:40:33,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 35 [2023-11-28 23:40:34,309 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:40:34,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 32 [2023-11-28 23:40:34,658 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:40:34,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 17 [2023-11-28 23:40:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:40:34,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:40:37,187 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 213 treesize of output 199 [2023-11-28 23:40:37,464 INFO L349 Elim1Store]: treesize reduction 48, result has 34.2 percent of original size [2023-11-28 23:40:37,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 3847635013 treesize of output 3661512779 [2023-11-28 23:40:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 23:40:43,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363027650] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:40:43,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:40:43,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 21] total 56 [2023-11-28 23:40:43,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366542617] [2023-11-28 23:40:43,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:40:43,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-28 23:40:43,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:43,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-28 23:40:43,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=2671, Unknown=0, NotChecked=0, Total=3080 [2023-11-28 23:40:43,321 INFO L87 Difference]: Start difference. First operand 154 states and 201 transitions. Second operand has 56 states, 56 states have (on average 1.5714285714285714) internal successors, (88), 56 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:42:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:42:26,059 INFO L93 Difference]: Finished difference Result 801 states and 1023 transitions. [2023-11-28 23:42:26,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-11-28 23:42:26,059 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.5714285714285714) internal successors, (88), 56 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-28 23:42:26,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:42:26,062 INFO L225 Difference]: With dead ends: 801 [2023-11-28 23:42:26,062 INFO L226 Difference]: Without dead ends: 680 [2023-11-28 23:42:26,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22164 ImplicationChecksByTransitivity, 96.5s TimeCoverageRelationStatistics Valid=6429, Invalid=49974, Unknown=3, NotChecked=0, Total=56406 [2023-11-28 23:42:26,070 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 513 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:42:26,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 607 Invalid, 2014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1825 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2023-11-28 23:42:26,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2023-11-28 23:42:26,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 166. [2023-11-28 23:42:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.412121212121212) internal successors, (233), 165 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:42:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 233 transitions. [2023-11-28 23:42:26,145 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 233 transitions. Word has length 34 [2023-11-28 23:42:26,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:42:26,146 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 233 transitions. [2023-11-28 23:42:26,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.5714285714285714) internal successors, (88), 56 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:42:26,146 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 233 transitions. [2023-11-28 23:42:26,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-28 23:42:26,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:42:26,147 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:42:26,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 23:42:26,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 23:42:26,348 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:42:26,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:42:26,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1722652605, now seen corresponding path program 5 times [2023-11-28 23:42:26,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:42:26,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929329405] [2023-11-28 23:42:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:42:26,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:42:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-28 23:42:26,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:42:26,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929329405] [2023-11-28 23:42:26,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929329405] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:42:26,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617805298] [2023-11-28 23:42:26,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 23:42:26,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:42:26,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:42:26,839 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:42:26,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 23:42:27,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-28 23:42:27,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:42:27,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 23:42:27,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:42:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 23:42:27,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:42:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 23:42:28,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617805298] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:42:28,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:42:28,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2023-11-28 23:42:28,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305765533] [2023-11-28 23:42:28,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:42:28,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 23:42:28,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:42:28,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 23:42:28,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2023-11-28 23:42:28,138 INFO L87 Difference]: Start difference. First operand 166 states and 233 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:42:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:42:29,002 INFO L93 Difference]: Finished difference Result 460 states and 647 transitions. [2023-11-28 23:42:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-28 23:42:29,003 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-28 23:42:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:42:29,005 INFO L225 Difference]: With dead ends: 460 [2023-11-28 23:42:29,005 INFO L226 Difference]: Without dead ends: 352 [2023-11-28 23:42:29,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 23:42:29,006 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 91 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:42:29,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 336 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:42:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2023-11-28 23:42:29,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 280. [2023-11-28 23:42:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.3476702508960574) internal successors, (376), 279 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:42:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 376 transitions. [2023-11-28 23:42:29,142 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 376 transitions. Word has length 37 [2023-11-28 23:42:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:42:29,142 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 376 transitions. [2023-11-28 23:42:29,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:42:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 376 transitions. [2023-11-28 23:42:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-28 23:42:29,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:42:29,143 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:42:29,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-28 23:42:29,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 23:42:29,344 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:42:29,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:42:29,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1989416691, now seen corresponding path program 3 times [2023-11-28 23:42:29,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:42:29,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660289122] [2023-11-28 23:42:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:42:29,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:42:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:42:30,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:42:30,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660289122] [2023-11-28 23:42:30,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660289122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:42:30,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710060358] [2023-11-28 23:42:30,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:42:30,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:42:30,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:42:30,208 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:42:30,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 23:42:30,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-28 23:42:30,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:42:30,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-28 23:42:30,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:42:30,456 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 36 treesize of output 20 [2023-11-28 23:42:30,553 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:42:30,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2023-11-28 23:42:30,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:42:30,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2023-11-28 23:42:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 23:42:30,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:42:31,065 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 72 treesize of output 64 [2023-11-28 23:42:31,090 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-11-28 23:42:31,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 476 treesize of output 408 [2023-11-28 23:42:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 23:42:31,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710060358] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:42:31,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:42:31,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 30 [2023-11-28 23:42:31,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592764352] [2023-11-28 23:42:31,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:42:31,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-28 23:42:31,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:42:31,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-28 23:42:31,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2023-11-28 23:42:31,327 INFO L87 Difference]: Start difference. First operand 280 states and 376 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:42:34,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:42:34,367 INFO L93 Difference]: Finished difference Result 466 states and 621 transitions. [2023-11-28 23:42:34,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-28 23:42:34,367 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-28 23:42:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:42:34,369 INFO L225 Difference]: With dead ends: 466 [2023-11-28 23:42:34,369 INFO L226 Difference]: Without dead ends: 362 [2023-11-28 23:42:34,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=483, Invalid=3549, Unknown=0, NotChecked=0, Total=4032 [2023-11-28 23:42:34,371 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 126 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:42:34,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 349 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-28 23:42:34,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-11-28 23:42:34,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 253. [2023-11-28 23:42:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.3293650793650793) internal successors, (335), 252 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:42:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 335 transitions. [2023-11-28 23:42:34,519 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 335 transitions. Word has length 37 [2023-11-28 23:42:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:42:34,519 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 335 transitions. [2023-11-28 23:42:34,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:42:34,519 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 335 transitions. [2023-11-28 23:42:34,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-28 23:42:34,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:42:34,520 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:42:34,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 23:42:34,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 23:42:34,720 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:42:34,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:42:34,721 INFO L85 PathProgramCache]: Analyzing trace with hash -966972285, now seen corresponding path program 4 times [2023-11-28 23:42:34,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:42:34,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282854339] [2023-11-28 23:42:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:42:34,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:42:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:42:35,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:42:35,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282854339] [2023-11-28 23:42:35,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282854339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:42:35,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048966665] [2023-11-28 23:42:35,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 23:42:35,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:42:35,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:42:35,379 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:42:35,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 23:42:35,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 23:42:35,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:42:35,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-28 23:42:35,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:42:35,894 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 36 treesize of output 20 [2023-11-28 23:42:36,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:42:36,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2023-11-28 23:42:36,291 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:42:36,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2023-11-28 23:42:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 23:42:36,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:42:36,846 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 74 treesize of output 66 [2023-11-28 23:42:36,870 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-11-28 23:42:36,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 494 treesize of output 426 [2023-11-28 23:42:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 23:42:37,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048966665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:42:37,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:42:37,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 15] total 41 [2023-11-28 23:42:37,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811234398] [2023-11-28 23:42:37,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:42:37,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-28 23:42:37,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:42:37,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-28 23:42:37,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2023-11-28 23:42:37,299 INFO L87 Difference]: Start difference. First operand 253 states and 335 transitions. Second operand has 41 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:42:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:42:42,607 INFO L93 Difference]: Finished difference Result 501 states and 651 transitions. [2023-11-28 23:42:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-28 23:42:42,607 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-28 23:42:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:42:42,609 INFO L225 Difference]: With dead ends: 501 [2023-11-28 23:42:42,609 INFO L226 Difference]: Without dead ends: 418 [2023-11-28 23:42:42,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3429 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1375, Invalid=9755, Unknown=0, NotChecked=0, Total=11130 [2023-11-28 23:42:42,611 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 311 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-28 23:42:42,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 374 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-28 23:42:42,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2023-11-28 23:42:42,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 257. [2023-11-28 23:42:42,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.31640625) internal successors, (337), 256 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:42:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 337 transitions. [2023-11-28 23:42:42,755 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 337 transitions. Word has length 37 [2023-11-28 23:42:42,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:42:42,756 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 337 transitions. [2023-11-28 23:42:42,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:42:42,756 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 337 transitions. [2023-11-28 23:42:42,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-28 23:42:42,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:42:42,757 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:42:42,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-28 23:42:42,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 23:42:42,958 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:42:42,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:42:42,958 INFO L85 PathProgramCache]: Analyzing trace with hash 38999279, now seen corresponding path program 5 times [2023-11-28 23:42:42,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:42:42,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042499578] [2023-11-28 23:42:42,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:42:42,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:42:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:42:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:42:44,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:42:44,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042499578] [2023-11-28 23:42:44,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042499578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:42:44,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940953921] [2023-11-28 23:42:44,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 23:42:44,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:42:44,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:42:44,270 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:42:44,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f86accfe-566e-460e-9475-48836cec85fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 23:42:44,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-28 23:42:44,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:42:44,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-28 23:42:44,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:42:44,558 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 [2023-11-28 23:42:44,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-28 23:42:44,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:42:44,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2023-11-28 23:42:44,738 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:42:44,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2023-11-28 23:42:44,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:42:44,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2023-11-28 23:42:44,970 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:42:44,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-28 23:42:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:42:44,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:42:57,555 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~key~0#1| Int) (v_ArrVal_480 Int) (|v_ULTIMATE.start_main_~key~0#1_46| Int)) (let ((.cse0 (let ((.cse1 (* |c_ULTIMATE.start_main_~j~0#1| 4))) (store (store (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~#v~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4) |ULTIMATE.start_main_~key~0#1|) (+ |c_ULTIMATE.start_main_~#v~0#1.offset| .cse1 4) v_ArrVal_480) (+ |c_ULTIMATE.start_main_~#v~0#1.offset| .cse1) |v_ULTIMATE.start_main_~key~0#1_46|)))) (< (select .cse0 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 4)) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 8)) 1)))) is different from false [2023-11-28 23:43:10,325 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 101 treesize of output 95 [2023-11-28 23:43:10,395 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2023-11-28 23:43:10,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 263183 treesize of output 254996 [2023-11-28 23:43:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 32 refuted. 1 times theorem prover too weak. 15 trivial. 15 not checked. [2023-11-28 23:43:10,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940953921] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:43:10,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:43:10,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 17] total 39 [2023-11-28 23:43:10,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771244097] [2023-11-28 23:43:10,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:43:10,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-28 23:43:10,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:43:10,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-28 23:43:10,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1232, Unknown=5, NotChecked=72, Total=1482 [2023-11-28 23:43:10,729 INFO L87 Difference]: Start difference. First operand 257 states and 337 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:43:25,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:44:17,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:45:45,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:45:49,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]