./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bor3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/bor3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU --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 f1b6ac589e17a1425c18d8694ea032f5464d66d6d18c040a40e1edc53bc0f3c5 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:59:41,888 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:59:41,980 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 21:59:41,986 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:59:41,991 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:59:42,030 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:59:42,031 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:59:42,032 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:59:42,033 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:59:42,034 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:59:42,035 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:59:42,035 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:59:42,036 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:59:42,036 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:59:42,036 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:59:42,039 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:59:42,039 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 21:59:42,039 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:59:42,040 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:59:42,040 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:59:42,041 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:59:42,041 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 21:59:42,041 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:59:42,042 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 21:59:42,042 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:59:42,042 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:59:42,043 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 21:59:42,043 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:59:42,043 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:59:42,044 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:59:42,044 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:59:42,044 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:59:42,044 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:59:42,045 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:59:42,045 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:59:42,045 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 21:59:42,046 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:59:42,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:59:42,046 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:59:42,046 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:59:42,047 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:59:42,047 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:59:42,047 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_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b6ac589e17a1425c18d8694ea032f5464d66d6d18c040a40e1edc53bc0f3c5 [2024-10-31 21:59:42,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:59:42,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:59:42,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:59:42,402 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:59:42,403 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:59:42,404 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/array-crafted/bor3.i Unable to find full path for "g++" [2024-10-31 21:59:44,463 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:59:44,656 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:59:44,656 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/sv-benchmarks/c/array-crafted/bor3.i [2024-10-31 21:59:44,665 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/data/52206c6a0/73568434971942d7a1eb1232424e6b3d/FLAG1ffe6352d [2024-10-31 21:59:44,682 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/data/52206c6a0/73568434971942d7a1eb1232424e6b3d [2024-10-31 21:59:44,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:59:44,685 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:59:44,687 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:59:44,687 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:59:44,697 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:59:44,698 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:59:44" (1/1) ... [2024-10-31 21:59:44,699 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ade0d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:44, skipping insertion in model container [2024-10-31 21:59:44,700 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:59:44" (1/1) ... [2024-10-31 21:59:44,725 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:59:44,931 WARN L251 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_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/sv-benchmarks/c/array-crafted/bor3.i[1297,1310] [2024-10-31 21:59:44,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:59:44,944 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:59:44,973 WARN L251 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_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/sv-benchmarks/c/array-crafted/bor3.i[1297,1310] [2024-10-31 21:59:44,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:59:44,991 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:59:44,992 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:44 WrapperNode [2024-10-31 21:59:44,992 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:59:44,993 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:59:44,993 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:59:44,993 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:59:45,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:44" (1/1) ... [2024-10-31 21:59:45,008 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:44" (1/1) ... [2024-10-31 21:59:45,028 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 76 [2024-10-31 21:59:45,028 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:59:45,029 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:59:45,029 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:59:45,029 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:59:45,041 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:44" (1/1) ... [2024-10-31 21:59:45,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:44" (1/1) ... [2024-10-31 21:59:45,044 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:44" (1/1) ... [2024-10-31 21:59:45,059 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 7, 11]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 5 writes are split as follows [0, 0, 5]. [2024-10-31 21:59:45,059 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:44" (1/1) ... [2024-10-31 21:59:45,060 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:44" (1/1) ... [2024-10-31 21:59:45,065 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:44" (1/1) ... [2024-10-31 21:59:45,071 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:44" (1/1) ... [2024-10-31 21:59:45,072 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:44" (1/1) ... [2024-10-31 21:59:45,078 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:44" (1/1) ... [2024-10-31 21:59:45,081 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:59:45,083 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:59:45,083 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:59:45,083 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:59:45,084 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:44" (1/1) ... [2024-10-31 21:59:45,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:59:45,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:45,116 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:59:45,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:59:45,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:59:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2024-10-31 21:59:45,145 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2024-10-31 21:59:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:59:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 21:59:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 21:59:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 21:59:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 21:59:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 21:59:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 21:59:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:59:45,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:59:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 21:59:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 21:59:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 21:59:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 21:59:45,232 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:59:45,234 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:59:45,415 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-10-31 21:59:45,415 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:59:45,431 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:59:45,431 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 21:59:45,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:59:45 BoogieIcfgContainer [2024-10-31 21:59:45,432 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:59:45,434 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:59:45,434 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:59:45,437 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:59:45,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:59:44" (1/3) ... [2024-10-31 21:59:45,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bdd988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:59:45, skipping insertion in model container [2024-10-31 21:59:45,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:44" (2/3) ... [2024-10-31 21:59:45,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bdd988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:59:45, skipping insertion in model container [2024-10-31 21:59:45,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:59:45" (3/3) ... [2024-10-31 21:59:45,440 INFO L112 eAbstractionObserver]: Analyzing ICFG bor3.i [2024-10-31 21:59:45,456 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:59:45,456 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 21:59:45,509 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:59:45,515 INFO L333 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, 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;@185ff2df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:59:45,516 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 21:59:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.4) internal successors, (35), 26 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 21:59:45,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-31 21:59:45,529 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:45,529 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:45,530 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:45,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:45,536 INFO L85 PathProgramCache]: Analyzing trace with hash 571232979, now seen corresponding path program 1 times [2024-10-31 21:59:45,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:45,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372754576] [2024-10-31 21:59:45,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:45,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:45,880 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 21:59:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:45,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 21:59:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:45,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-31 21:59:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 21:59:46,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:46,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372754576] [2024-10-31 21:59:46,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372754576] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:46,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515343354] [2024-10-31 21:59:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:46,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:46,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:46,037 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:46,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:59:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:46,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 21:59:46,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 21:59:46,260 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:59:46,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515343354] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:46,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:59:46,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-31 21:59:46,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442055512] [2024-10-31 21:59:46,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:46,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:59:46,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:46,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:59:46,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:59:46,305 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.4) internal successors, (35), 26 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 21:59:46,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:46,351 INFO L93 Difference]: Finished difference Result 60 states and 83 transitions. [2024-10-31 21:59:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:59:46,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2024-10-31 21:59:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:46,363 INFO L225 Difference]: With dead ends: 60 [2024-10-31 21:59:46,363 INFO L226 Difference]: Without dead ends: 29 [2024-10-31 21:59:46,367 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:59:46,372 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:46,373 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 66 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:59:46,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-31 21:59:46,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2024-10-31 21:59:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 21:59:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-10-31 21:59:46,414 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 29 [2024-10-31 21:59:46,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:46,415 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-10-31 21:59:46,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 21:59:46,416 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-10-31 21:59:46,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-31 21:59:46,418 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:46,418 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:46,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 21:59:46,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-10-31 21:59:46,623 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:46,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:46,625 INFO L85 PathProgramCache]: Analyzing trace with hash 572560753, now seen corresponding path program 1 times [2024-10-31 21:59:46,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:46,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711954015] [2024-10-31 21:59:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:46,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:46,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-31 21:59:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:46,844 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 21:59:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:46,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 21:59:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 21:59:46,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:46,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711954015] [2024-10-31 21:59:46,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711954015] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:46,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521732906] [2024-10-31 21:59:46,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:46,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:46,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:46,884 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:46,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:59:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:47,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 21:59:47,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 21:59:47,046 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:59:47,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521732906] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:47,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:59:47,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-31 21:59:47,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942965704] [2024-10-31 21:59:47,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:47,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:59:47,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:47,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:59:47,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:59:47,052 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 21:59:47,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:47,077 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2024-10-31 21:59:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:59:47,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-10-31 21:59:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:47,081 INFO L225 Difference]: With dead ends: 55 [2024-10-31 21:59:47,082 INFO L226 Difference]: Without dead ends: 34 [2024-10-31 21:59:47,083 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:59:47,085 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 60 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 [2024-10-31 21:59:47,086 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 60 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:59:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-31 21:59:47,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2024-10-31 21:59:47,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 21:59:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-10-31 21:59:47,099 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 31 [2024-10-31 21:59:47,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:47,100 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-10-31 21:59:47,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 21:59:47,100 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-10-31 21:59:47,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-31 21:59:47,102 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:47,102 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:47,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 21:59:47,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:47,309 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:47,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:47,309 INFO L85 PathProgramCache]: Analyzing trace with hash -205733940, now seen corresponding path program 1 times [2024-10-31 21:59:47,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:47,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904913238] [2024-10-31 21:59:47,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:47,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:47,412 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-31 21:59:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:47,456 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-31 21:59:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:47,466 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-31 21:59:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 21:59:47,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:47,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904913238] [2024-10-31 21:59:47,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904913238] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:47,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673039755] [2024-10-31 21:59:47,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:47,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:47,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:47,480 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:47,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:59:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:47,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 21:59:47,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 21:59:47,628 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:59:47,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673039755] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:47,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:59:47,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-10-31 21:59:47,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098125921] [2024-10-31 21:59:47,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:47,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:59:47,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:47,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:59:47,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-31 21:59:47,633 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 21:59:47,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:47,657 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2024-10-31 21:59:47,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:59:47,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-10-31 21:59:47,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:47,659 INFO L225 Difference]: With dead ends: 48 [2024-10-31 21:59:47,661 INFO L226 Difference]: Without dead ends: 31 [2024-10-31 21:59:47,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-31 21:59:47,663 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:47,665 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:59:47,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-31 21:59:47,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2024-10-31 21:59:47,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 21:59:47,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-10-31 21:59:47,677 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 43 [2024-10-31 21:59:47,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:47,680 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-10-31 21:59:47,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 21:59:47,681 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-10-31 21:59:47,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-31 21:59:47,684 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:47,684 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:47,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 21:59:47,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:47,886 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:47,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:47,887 INFO L85 PathProgramCache]: Analyzing trace with hash -346372054, now seen corresponding path program 1 times [2024-10-31 21:59:47,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:47,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229850300] [2024-10-31 21:59:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:47,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:48,011 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-31 21:59:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:48,059 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-31 21:59:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:48,072 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-31 21:59:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 21:59:48,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:48,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229850300] [2024-10-31 21:59:48,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229850300] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:48,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94024794] [2024-10-31 21:59:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:48,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:48,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:48,091 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:48,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:59:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:48,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 21:59:48,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-31 21:59:48,255 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-31 21:59:48,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94024794] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:48,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:59:48,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2024-10-31 21:59:48,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807433945] [2024-10-31 21:59:48,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:48,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 21:59:48,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:48,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 21:59:48,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:59:48,321 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-31 21:59:48,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:48,395 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2024-10-31 21:59:48,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 21:59:48,396 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 45 [2024-10-31 21:59:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:48,399 INFO L225 Difference]: With dead ends: 72 [2024-10-31 21:59:48,399 INFO L226 Difference]: Without dead ends: 47 [2024-10-31 21:59:48,400 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:59:48,401 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:48,401 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 88 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:59:48,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-31 21:59:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2024-10-31 21:59:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 21:59:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2024-10-31 21:59:48,411 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 45 [2024-10-31 21:59:48,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:48,412 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2024-10-31 21:59:48,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-31 21:59:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2024-10-31 21:59:48,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-31 21:59:48,419 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:48,419 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:48,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 21:59:48,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:48,626 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:48,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:48,627 INFO L85 PathProgramCache]: Analyzing trace with hash 520911199, now seen corresponding path program 2 times [2024-10-31 21:59:48,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:48,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103301734] [2024-10-31 21:59:48,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:48,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:48,908 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-31 21:59:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:48,927 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-31 21:59:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:48,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-31 21:59:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-10-31 21:59:48,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:48,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103301734] [2024-10-31 21:59:48,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103301734] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:48,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231000982] [2024-10-31 21:59:48,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:59:48,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:48,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:48,971 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:48,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:59:49,084 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:59:49,084 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:59:49,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 21:59:49,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-10-31 21:59:49,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-10-31 21:59:49,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231000982] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:49,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:59:49,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-10-31 21:59:49,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636883182] [2024-10-31 21:59:49,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:49,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 21:59:49,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:49,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 21:59:49,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-31 21:59:49,302 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-31 21:59:49,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:49,389 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2024-10-31 21:59:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 21:59:49,390 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2024-10-31 21:59:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:49,391 INFO L225 Difference]: With dead ends: 88 [2024-10-31 21:59:49,392 INFO L226 Difference]: Without dead ends: 57 [2024-10-31 21:59:49,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-31 21:59:49,393 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:49,393 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 106 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:59:49,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-31 21:59:49,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-10-31 21:59:49,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 21:59:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2024-10-31 21:59:49,401 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 63 [2024-10-31 21:59:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:49,401 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2024-10-31 21:59:49,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-31 21:59:49,402 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2024-10-31 21:59:49,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-10-31 21:59:49,403 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:49,403 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:49,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 21:59:49,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:49,608 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:49,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:49,609 INFO L85 PathProgramCache]: Analyzing trace with hash -617514511, now seen corresponding path program 3 times [2024-10-31 21:59:49,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:49,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614995789] [2024-10-31 21:59:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:49,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:49,724 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 21:59:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:49,760 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-31 21:59:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:49,768 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-10-31 21:59:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2024-10-31 21:59:49,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:49,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614995789] [2024-10-31 21:59:49,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614995789] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:49,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383382468] [2024-10-31 21:59:49,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 21:59:49,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:49,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:49,780 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:49,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 21:59:49,892 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 21:59:49,893 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:59:49,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 21:59:49,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2024-10-31 21:59:49,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2024-10-31 21:59:50,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383382468] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:50,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:59:50,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-10-31 21:59:50,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995072230] [2024-10-31 21:59:50,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:50,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 21:59:50,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:50,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 21:59:50,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-10-31 21:59:50,012 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-31 21:59:50,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:50,073 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2024-10-31 21:59:50,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 21:59:50,080 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 77 [2024-10-31 21:59:50,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:50,081 INFO L225 Difference]: With dead ends: 111 [2024-10-31 21:59:50,081 INFO L226 Difference]: Without dead ends: 80 [2024-10-31 21:59:50,082 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-10-31 21:59:50,083 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:50,087 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 107 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:59:50,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-10-31 21:59:50,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-10-31 21:59:50,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.2) internal successors, (90), 75 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 21:59:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2024-10-31 21:59:50,102 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 77 [2024-10-31 21:59:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:50,102 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2024-10-31 21:59:50,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-31 21:59:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2024-10-31 21:59:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-10-31 21:59:50,107 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:50,107 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:50,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-31 21:59:50,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 21:59:50,308 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:50,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1183854685, now seen corresponding path program 4 times [2024-10-31 21:59:50,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:50,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908950047] [2024-10-31 21:59:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:50,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:50,792 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 21:59:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:50,805 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-10-31 21:59:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:50,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-10-31 21:59:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2024-10-31 21:59:50,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:50,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908950047] [2024-10-31 21:59:50,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908950047] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:50,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570825679] [2024-10-31 21:59:50,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 21:59:50,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:50,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:50,834 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:50,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 21:59:50,993 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 21:59:50,993 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:59:50,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 21:59:50,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2024-10-31 21:59:51,052 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2024-10-31 21:59:51,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570825679] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:51,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:59:51,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-10-31 21:59:51,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83235840] [2024-10-31 21:59:51,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:51,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-31 21:59:51,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:51,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-31 21:59:51,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-31 21:59:51,357 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-31 21:59:51,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:51,487 INFO L93 Difference]: Finished difference Result 161 states and 204 transitions. [2024-10-31 21:59:51,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-31 21:59:51,488 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2024-10-31 21:59:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:51,489 INFO L225 Difference]: With dead ends: 161 [2024-10-31 21:59:51,489 INFO L226 Difference]: Without dead ends: 104 [2024-10-31 21:59:51,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-31 21:59:51,491 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:51,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 199 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:59:51,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-10-31 21:59:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-10-31 21:59:51,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.1515151515151516) internal successors, (114), 99 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 21:59:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2024-10-31 21:59:51,510 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 125 [2024-10-31 21:59:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:51,510 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2024-10-31 21:59:51,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-31 21:59:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2024-10-31 21:59:51,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-10-31 21:59:51,513 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:51,513 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:51,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 21:59:51,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-31 21:59:51,717 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:51,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:51,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1815916741, now seen corresponding path program 5 times [2024-10-31 21:59:51,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:51,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612905381] [2024-10-31 21:59:51,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:51,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:52,867 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-31 21:59:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:52,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-10-31 21:59:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:52,906 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-10-31 21:59:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2024-10-31 21:59:52,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:52,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612905381] [2024-10-31 21:59:52,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612905381] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:52,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285255326] [2024-10-31 21:59:52,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 21:59:52,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:52,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:52,922 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:52,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 21:59:54,283 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2024-10-31 21:59:54,283 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:59:54,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 21:59:54,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2024-10-31 21:59:54,489 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2024-10-31 21:59:54,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285255326] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:54,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:59:54,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2024-10-31 21:59:54,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177511154] [2024-10-31 21:59:54,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:54,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-31 21:59:54,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:54,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-31 21:59:54,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2024-10-31 21:59:54,763 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-31 21:59:54,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:54,948 INFO L93 Difference]: Finished difference Result 212 states and 271 transitions. [2024-10-31 21:59:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-31 21:59:54,949 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 149 [2024-10-31 21:59:54,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:54,953 INFO L225 Difference]: With dead ends: 212 [2024-10-31 21:59:54,953 INFO L226 Difference]: Without dead ends: 155 [2024-10-31 21:59:54,954 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2024-10-31 21:59:54,959 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 123 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:54,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 243 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:59:54,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-10-31 21:59:54,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2024-10-31 21:59:54,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.2080536912751678) internal successors, (180), 149 states have internal predecessors, (180), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 21:59:54,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 186 transitions. [2024-10-31 21:59:54,983 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 186 transitions. Word has length 149 [2024-10-31 21:59:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:54,983 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 186 transitions. [2024-10-31 21:59:54,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-31 21:59:54,984 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 186 transitions. [2024-10-31 21:59:54,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2024-10-31 21:59:54,987 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:54,987 INFO L215 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:55,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 21:59:55,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-31 21:59:55,188 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:55,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:55,189 INFO L85 PathProgramCache]: Analyzing trace with hash 871112251, now seen corresponding path program 6 times [2024-10-31 21:59:55,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:55,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21432294] [2024-10-31 21:59:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:55,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:55,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:56,315 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-31 21:59:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:56,336 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2024-10-31 21:59:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:56,357 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2024-10-31 21:59:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3589 trivial. 0 not checked. [2024-10-31 21:59:56,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:56,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21432294] [2024-10-31 21:59:56,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21432294] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:56,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051944912] [2024-10-31 21:59:56,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 21:59:56,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:56,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:56,381 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:56,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 21:59:56,559 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-31 21:59:56,559 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:59:56,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 21:59:56,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2024-10-31 21:59:56,639 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4114 trivial. 0 not checked. [2024-10-31 21:59:56,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051944912] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:56,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:59:56,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 5, 5] total 32 [2024-10-31 21:59:56,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573392780] [2024-10-31 21:59:56,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:56,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-31 21:59:56,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:56,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-31 21:59:56,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2024-10-31 21:59:56,735 INFO L87 Difference]: Start difference. First operand 154 states and 186 transitions. Second operand has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-31 21:59:56,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:56,874 INFO L93 Difference]: Finished difference Result 270 states and 338 transitions. [2024-10-31 21:59:56,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-31 21:59:56,875 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 247 [2024-10-31 21:59:56,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:56,876 INFO L225 Difference]: With dead ends: 270 [2024-10-31 21:59:56,877 INFO L226 Difference]: Without dead ends: 165 [2024-10-31 21:59:56,878 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2024-10-31 21:59:56,879 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:56,879 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 182 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:59:56,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-10-31 21:59:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2024-10-31 21:59:56,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.1949685534591195) internal successors, (190), 159 states have internal predecessors, (190), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 21:59:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 196 transitions. [2024-10-31 21:59:56,892 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 196 transitions. Word has length 247 [2024-10-31 21:59:56,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:56,892 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 196 transitions. [2024-10-31 21:59:56,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-31 21:59:56,893 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 196 transitions. [2024-10-31 21:59:56,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2024-10-31 21:59:56,896 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:56,897 INFO L215 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:56,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 21:59:57,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:57,098 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:57,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:57,098 INFO L85 PathProgramCache]: Analyzing trace with hash 466440657, now seen corresponding path program 7 times [2024-10-31 21:59:57,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:57,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389559806] [2024-10-31 21:59:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:57,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:58,224 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-10-31 21:59:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:58,243 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-10-31 21:59:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:58,260 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2024-10-31 21:59:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2024-10-31 21:59:58,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:58,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389559806] [2024-10-31 21:59:58,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389559806] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:58,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738993434] [2024-10-31 21:59:58,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-31 21:59:58,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:58,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:58,283 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:58,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 21:59:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:58,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-31 21:59:58,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2024-10-31 21:59:58,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2024-10-31 21:59:59,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738993434] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:59,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:59:59,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2024-10-31 21:59:59,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661029587] [2024-10-31 21:59:59,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:59,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-10-31 21:59:59,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:59,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-10-31 21:59:59,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2024-10-31 21:59:59,872 INFO L87 Difference]: Start difference. First operand 164 states and 196 transitions. Second operand has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-31 22:00:00,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:00:00,109 INFO L93 Difference]: Finished difference Result 329 states and 418 transitions. [2024-10-31 22:00:00,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-10-31 22:00:00,109 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 257 [2024-10-31 22:00:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:00:00,113 INFO L225 Difference]: With dead ends: 329 [2024-10-31 22:00:00,113 INFO L226 Difference]: Without dead ends: 216 [2024-10-31 22:00:00,114 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2024-10-31 22:00:00,115 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:00:00,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 199 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:00:00,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-10-31 22:00:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2024-10-31 22:00:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.146919431279621) internal successors, (242), 211 states have internal predecessors, (242), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 22:00:00,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 248 transitions. [2024-10-31 22:00:00,131 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 248 transitions. Word has length 257 [2024-10-31 22:00:00,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:00:00,132 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 248 transitions. [2024-10-31 22:00:00,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-31 22:00:00,132 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 248 transitions. [2024-10-31 22:00:00,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2024-10-31 22:00:00,137 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:00,137 INFO L215 NwaCegarLoop]: trace histogram [50, 50, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:00,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-31 22:00:00,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:00,338 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:00,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:00,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1677873757, now seen corresponding path program 8 times [2024-10-31 22:00:00,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:00,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703783344] [2024-10-31 22:00:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:00,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:03,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-10-31 22:00:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:03,530 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2024-10-31 22:00:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:03,547 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2024-10-31 22:00:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2024-10-31 22:00:03,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:03,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703783344] [2024-10-31 22:00:03,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703783344] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:03,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212686441] [2024-10-31 22:00:03,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:00:03,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:03,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:03,569 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:03,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 22:00:03,906 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:00:03,907 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:03,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-31 22:00:03,918 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2024-10-31 22:00:04,112 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2024-10-31 22:00:08,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212686441] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:08,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:08,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2024-10-31 22:00:08,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139695136] [2024-10-31 22:00:08,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:08,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-10-31 22:00:08,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:08,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-10-31 22:00:08,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2024-10-31 22:00:08,225 INFO L87 Difference]: Start difference. First operand 216 states and 248 transitions. Second operand has 105 states, 105 states have (on average 2.2285714285714286) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-31 22:00:08,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:00:08,712 INFO L93 Difference]: Finished difference Result 433 states and 548 transitions. [2024-10-31 22:00:08,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-10-31 22:00:08,713 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.2285714285714286) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 309 [2024-10-31 22:00:08,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:00:08,716 INFO L225 Difference]: With dead ends: 433 [2024-10-31 22:00:08,717 INFO L226 Difference]: Without dead ends: 320 [2024-10-31 22:00:08,721 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2024-10-31 22:00:08,722 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:00:08,723 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 171 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:00:08,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-10-31 22:00:08,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2024-10-31 22:00:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.0984126984126985) internal successors, (346), 315 states have internal predecessors, (346), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 22:00:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 352 transitions. [2024-10-31 22:00:08,746 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 352 transitions. Word has length 309 [2024-10-31 22:00:08,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:00:08,747 INFO L471 AbstractCegarLoop]: Abstraction has 320 states and 352 transitions. [2024-10-31 22:00:08,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.2285714285714286) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-31 22:00:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 352 transitions. [2024-10-31 22:00:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2024-10-31 22:00:08,757 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:08,757 INFO L215 NwaCegarLoop]: trace histogram [102, 102, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:08,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-31 22:00:08,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92ed0c9c-a54f-442b-b3c3-0f888f8e6304/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:08,959 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:08,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:08,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1657632395, now seen corresponding path program 9 times [2024-10-31 22:00:08,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:08,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490189153] [2024-10-31 22:00:08,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:08,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat