./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx --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 affe6b2992f7714f4bd95d6011e70945dc7608cfcd3847461bdcd80eeea00f05 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 21:00:01,776 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 21:00:01,902 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 21:00:01,906 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 21:00:01,907 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 21:00:01,946 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 21:00:01,948 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 21:00:01,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 21:00:01,950 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 21:00:01,958 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 21:00:01,958 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 21:00:01,959 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 21:00:01,959 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 21:00:01,961 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 21:00:01,962 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 21:00:01,962 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 21:00:01,963 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 21:00:01,963 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 21:00:01,963 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 21:00:01,964 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 21:00:01,964 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 21:00:01,965 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 21:00:01,965 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 21:00:01,966 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 21:00:01,966 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 21:00:01,967 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 21:00:01,967 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 21:00:01,968 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 21:00:01,968 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 21:00:01,969 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 21:00:01,970 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 21:00:01,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:00:01,971 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 21:00:01,971 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 21:00:01,971 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 21:00:01,971 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 21:00:01,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 21:00:01,972 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 21:00:01,972 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 21:00:01,972 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 21:00:01,973 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 21:00:01,973 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 21:00:01,974 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_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> affe6b2992f7714f4bd95d6011e70945dc7608cfcd3847461bdcd80eeea00f05 [2023-11-21 21:00:02,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 21:00:02,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 21:00:02,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 21:00:02,291 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 21:00:02,292 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 21:00:02,293 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i [2023-11-21 21:00:05,405 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 21:00:05,619 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 21:00:05,620 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i [2023-11-21 21:00:05,630 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/data/058001e18/2bf3473227124a4289021e498bbc2198/FLAGb2ae4986a [2023-11-21 21:00:05,646 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/data/058001e18/2bf3473227124a4289021e498bbc2198 [2023-11-21 21:00:05,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 21:00:05,651 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 21:00:05,653 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 21:00:05,653 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 21:00:05,659 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 21:00:05,660 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:00:05" (1/1) ... [2023-11-21 21:00:05,661 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@701802d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:05, skipping insertion in model container [2023-11-21 21:00:05,662 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:00:05" (1/1) ... [2023-11-21 21:00:05,705 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:00:05,879 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_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i[1692,1705] [2023-11-21 21:00:05,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:00:05,928 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 21:00:05,946 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_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i[1692,1705] [2023-11-21 21:00:05,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:00:05,993 INFO L206 MainTranslator]: Completed translation [2023-11-21 21:00:05,993 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:05 WrapperNode [2023-11-21 21:00:05,993 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 21:00:05,995 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 21:00:05,996 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 21:00:05,996 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 21:00:06,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:05" (1/1) ... [2023-11-21 21:00:06,016 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:05" (1/1) ... [2023-11-21 21:00:06,036 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2023-11-21 21:00:06,036 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 21:00:06,037 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 21:00:06,037 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 21:00:06,038 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 21:00:06,051 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:05" (1/1) ... [2023-11-21 21:00:06,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:05" (1/1) ... [2023-11-21 21:00:06,063 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:05" (1/1) ... [2023-11-21 21:00:06,086 INFO L187 HeapSplitter]: Split 18 memory accesses to 3 slices as follows [2, 13, 3] [2023-11-21 21:00:06,087 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:05" (1/1) ... [2023-11-21 21:00:06,087 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:05" (1/1) ... [2023-11-21 21:00:06,104 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:05" (1/1) ... [2023-11-21 21:00:06,106 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:05" (1/1) ... [2023-11-21 21:00:06,107 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:05" (1/1) ... [2023-11-21 21:00:06,109 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:05" (1/1) ... [2023-11-21 21:00:06,111 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 21:00:06,112 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 21:00:06,112 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 21:00:06,112 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 21:00:06,113 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:05" (1/1) ... [2023-11-21 21:00:06,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:00:06,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:06,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 21:00:06,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 21:00:06,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 21:00:06,201 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_33_0 [2023-11-21 21:00:06,201 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_33_0 [2023-11-21 21:00:06,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 21:00:06,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 21:00:06,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-21 21:00:06,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 21:00:06,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-21 21:00:06,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-21 21:00:06,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-21 21:00:06,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 21:00:06,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 21:00:06,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-21 21:00:06,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-21 21:00:06,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-21 21:00:06,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 21:00:06,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 21:00:06,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 21:00:06,207 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_36_to_40_0 [2023-11-21 21:00:06,207 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_36_to_40_0 [2023-11-21 21:00:06,337 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 21:00:06,340 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 21:00:06,570 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 21:00:06,596 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 21:00:06,597 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 21:00:06,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:00:06 BoogieIcfgContainer [2023-11-21 21:00:06,599 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 21:00:06,602 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 21:00:06,602 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 21:00:06,606 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 21:00:06,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:00:05" (1/3) ... [2023-11-21 21:00:06,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b1508d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:00:06, skipping insertion in model container [2023-11-21 21:00:06,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:05" (2/3) ... [2023-11-21 21:00:06,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b1508d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:00:06, skipping insertion in model container [2023-11-21 21:00:06,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:00:06" (3/3) ... [2023-11-21 21:00:06,609 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_1-1.i [2023-11-21 21:00:06,632 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 21:00:06,632 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 21:00:06,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:00:06,751 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;@21b811d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:00:06,751 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 21:00:06,755 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 20 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 21:00:06,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 21:00:06,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:06,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:06,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:06,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:06,771 INFO L85 PathProgramCache]: Analyzing trace with hash -861965109, now seen corresponding path program 1 times [2023-11-21 21:00:06,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:06,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005366875] [2023-11-21 21:00:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:06,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:07,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:07,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:07,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005366875] [2023-11-21 21:00:07,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005366875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:07,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:07,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 21:00:07,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974291833] [2023-11-21 21:00:07,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:07,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 21:00:07,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:07,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 21:00:07,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:00:07,792 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 20 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:08,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:08,035 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2023-11-21 21:00:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 21:00:08,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-21 21:00:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:08,050 INFO L225 Difference]: With dead ends: 54 [2023-11-21 21:00:08,050 INFO L226 Difference]: Without dead ends: 26 [2023-11-21 21:00:08,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:00:08,058 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:08,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 40 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:00:08,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-21 21:00:08,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-21 21:00:08,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-21 21:00:08,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-21 21:00:08,103 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2023-11-21 21:00:08,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:08,104 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-21 21:00:08,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:08,105 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-21 21:00:08,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 21:00:08,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:08,107 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:08,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 21:00:08,107 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:08,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:08,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1296273823, now seen corresponding path program 1 times [2023-11-21 21:00:08,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:08,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966319350] [2023-11-21 21:00:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:08,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:08,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:08,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:00:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:08,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:08,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966319350] [2023-11-21 21:00:08,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966319350] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:08,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500017846] [2023-11-21 21:00:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:08,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:08,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:08,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:08,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 21:00:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:09,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-21 21:00:09,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:09,121 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 11 treesize of output 7 [2023-11-21 21:00:09,281 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 83 treesize of output 70 [2023-11-21 21:00:09,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2023-11-21 21:00:09,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 24 [2023-11-21 21:00:09,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-21 21:00:09,526 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 11 treesize of output 7 [2023-11-21 21:00:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:09,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:10,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 21:00:10,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 88 [2023-11-21 21:00:10,574 INFO L349 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2023-11-21 21:00:10,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 55 [2023-11-21 21:00:10,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 21:00:10,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 26 [2023-11-21 21:00:11,054 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 21:00:11,054 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 98 treesize of output 100 [2023-11-21 21:00:11,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-21 21:00:11,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 48 [2023-11-21 21:00:11,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2023-11-21 21:00:11,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:11,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500017846] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:00:11,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:00:11,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 31 [2023-11-21 21:00:11,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984332638] [2023-11-21 21:00:11,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:11,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-21 21:00:11,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:11,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-21 21:00:11,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2023-11-21 21:00:11,384 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 32 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 10 states have call successors, (12), 9 states have call predecessors, (12), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-21 21:00:12,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:12,473 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2023-11-21 21:00:12,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 21:00:12,473 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 10 states have call successors, (12), 9 states have call predecessors, (12), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 20 [2023-11-21 21:00:12,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:12,475 INFO L225 Difference]: With dead ends: 52 [2023-11-21 21:00:12,475 INFO L226 Difference]: Without dead ends: 33 [2023-11-21 21:00:12,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2023-11-21 21:00:12,478 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:12,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 125 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 21:00:12,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-21 21:00:12,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2023-11-21 21:00:12,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-21 21:00:12,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-21 21:00:12,488 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2023-11-21 21:00:12,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:12,489 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-21 21:00:12,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 10 states have call successors, (12), 9 states have call predecessors, (12), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-21 21:00:12,489 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-21 21:00:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 21:00:12,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:12,491 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:12,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:12,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-21 21:00:12,705 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:12,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:12,706 INFO L85 PathProgramCache]: Analyzing trace with hash 963661205, now seen corresponding path program 2 times [2023-11-21 21:00:12,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:12,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379790700] [2023-11-21 21:00:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:12,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:13,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:13,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:00:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:13,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:00:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 21:00:13,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:13,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379790700] [2023-11-21 21:00:13,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379790700] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:13,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049704024] [2023-11-21 21:00:13,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 21:00:13,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:13,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:13,926 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:13,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 21:00:14,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 21:00:14,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:00:14,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-21 21:00:14,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:14,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 21:00:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 21:00:14,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:15,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049704024] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:00:15,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:00:15,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 13] total 30 [2023-11-21 21:00:15,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540518738] [2023-11-21 21:00:15,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:15,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-21 21:00:15,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:15,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-21 21:00:15,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2023-11-21 21:00:15,307 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 31 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 8 states have call successors, (10), 6 states have call predecessors, (10), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-21 21:00:16,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:16,394 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2023-11-21 21:00:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-21 21:00:16,395 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 8 states have call successors, (10), 6 states have call predecessors, (10), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 25 [2023-11-21 21:00:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:16,397 INFO L225 Difference]: With dead ends: 69 [2023-11-21 21:00:16,397 INFO L226 Difference]: Without dead ends: 48 [2023-11-21 21:00:16,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=322, Invalid=1748, Unknown=0, NotChecked=0, Total=2070 [2023-11-21 21:00:16,400 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:16,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 74 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 21:00:16,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-21 21:00:16,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2023-11-21 21:00:16,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-21 21:00:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-11-21 21:00:16,419 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 25 [2023-11-21 21:00:16,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:16,419 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-11-21 21:00:16,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 8 states have call successors, (10), 6 states have call predecessors, (10), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-21 21:00:16,420 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-11-21 21:00:16,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-21 21:00:16,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:16,422 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:16,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:16,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:16,644 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:16,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:16,644 INFO L85 PathProgramCache]: Analyzing trace with hash -799995863, now seen corresponding path program 3 times [2023-11-21 21:00:16,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:16,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362975276] [2023-11-21 21:00:16,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:16,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:18,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:19,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:00:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:20,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:00:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:21,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:00:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:21,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:00:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:22,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:00:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:22,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:00:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 21:00:22,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:22,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362975276] [2023-11-21 21:00:22,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362975276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:22,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321675301] [2023-11-21 21:00:22,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 21:00:22,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:22,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:22,755 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:22,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 21:00:23,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-21 21:00:23,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:00:23,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 95 conjunts are in the unsatisfiable core [2023-11-21 21:00:23,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:23,897 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 11 treesize of output 7 [2023-11-21 21:00:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-21 21:00:24,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:29,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321675301] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:00:29,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:00:29,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 29] total 63 [2023-11-21 21:00:29,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864466829] [2023-11-21 21:00:29,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:29,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-21 21:00:29,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:29,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-21 21:00:29,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=3643, Unknown=0, NotChecked=0, Total=4032 [2023-11-21 21:00:29,474 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 64 states, 48 states have (on average 1.3125) internal successors, (63), 54 states have internal predecessors, (63), 17 states have call successors, (18), 10 states have call predecessors, (18), 21 states have return successors, (21), 19 states have call predecessors, (21), 16 states have call successors, (21) [2023-11-21 21:00:36,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:36,851 INFO L93 Difference]: Finished difference Result 139 states and 193 transitions. [2023-11-21 21:00:36,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-21 21:00:36,852 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 48 states have (on average 1.3125) internal successors, (63), 54 states have internal predecessors, (63), 17 states have call successors, (18), 10 states have call predecessors, (18), 21 states have return successors, (21), 19 states have call predecessors, (21), 16 states have call successors, (21) Word has length 45 [2023-11-21 21:00:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:36,856 INFO L225 Difference]: With dead ends: 139 [2023-11-21 21:00:36,856 INFO L226 Difference]: Without dead ends: 112 [2023-11-21 21:00:36,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1745, Invalid=11827, Unknown=0, NotChecked=0, Total=13572 [2023-11-21 21:00:36,873 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 291 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:36,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 245 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-21 21:00:36,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-21 21:00:36,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2023-11-21 21:00:36,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 12 states have call successors, (12), 9 states have call predecessors, (12), 16 states have return successors, (18), 17 states have call predecessors, (18), 10 states have call successors, (18) [2023-11-21 21:00:36,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2023-11-21 21:00:36,908 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 45 [2023-11-21 21:00:36,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:36,908 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2023-11-21 21:00:36,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 48 states have (on average 1.3125) internal successors, (63), 54 states have internal predecessors, (63), 17 states have call successors, (18), 10 states have call predecessors, (18), 21 states have return successors, (21), 19 states have call predecessors, (21), 16 states have call successors, (21) [2023-11-21 21:00:36,909 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2023-11-21 21:00:36,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-21 21:00:36,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:36,913 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:36,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:37,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4bffb5-75ce-4d23-a21f-4ce935caeb4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:37,121 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:37,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:37,122 INFO L85 PathProgramCache]: Analyzing trace with hash 605856081, now seen corresponding path program 4 times [2023-11-21 21:00:37,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:37,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246778837] [2023-11-21 21:00:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:37,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:42,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:47,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 21:00:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat