./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_palindrome_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_palindrome_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX --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 270a2842345dc5b188d8b64dce3436ccc5910bc1472a41053bc5c00e7f4ceeb6 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 19:12:10,003 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 19:12:10,060 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 19:12:10,065 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 19:12:10,065 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 19:12:10,086 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 19:12:10,087 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 19:12:10,087 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 19:12:10,087 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 19:12:10,088 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 19:12:10,088 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 19:12:10,088 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 19:12:10,089 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 19:12:10,089 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 19:12:10,090 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 19:12:10,090 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 19:12:10,091 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 19:12:10,091 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 19:12:10,091 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 19:12:10,092 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 19:12:10,092 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 19:12:10,092 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 19:12:10,093 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 19:12:10,093 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 19:12:10,094 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 19:12:10,094 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 19:12:10,094 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 19:12:10,094 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 19:12:10,095 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 19:12:10,095 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 19:12:10,096 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 19:12:10,096 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 19:12:10,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 19:12:10,109 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 19:12:10,110 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 19:12:10,110 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 19:12:10,110 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 19:12:10,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 19:12:10,111 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 19:12:10,111 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 19:12:10,112 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 19:12:10,116 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 19:12:10,117 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_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 270a2842345dc5b188d8b64dce3436ccc5910bc1472a41053bc5c00e7f4ceeb6 [2024-11-08 19:12:10,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 19:12:10,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 19:12:10,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 19:12:10,429 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 19:12:10,430 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 19:12:10,431 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/array-examples/standard_palindrome_ground.i Unable to find full path for "g++" [2024-11-08 19:12:12,373 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 19:12:12,585 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 19:12:12,585 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/sv-benchmarks/c/array-examples/standard_palindrome_ground.i [2024-11-08 19:12:12,596 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/data/fe1d3f782/bf9e8a22d1784b5bb2a8709d7d139640/FLAG60f16ede1 [2024-11-08 19:12:12,616 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/data/fe1d3f782/bf9e8a22d1784b5bb2a8709d7d139640 [2024-11-08 19:12:12,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 19:12:12,620 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 19:12:12,622 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 19:12:12,623 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 19:12:12,629 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 19:12:12,629 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 07:12:12" (1/1) ... [2024-11-08 19:12:12,631 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@496b117a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:12:12, skipping insertion in model container [2024-11-08 19:12:12,633 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 07:12:12" (1/1) ... [2024-11-08 19:12:12,659 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 19:12:12,868 WARN L250 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_b183bfe6-d4dd-4a36-83ef-10cf515da375/sv-benchmarks/c/array-examples/standard_palindrome_ground.i[819,832] [2024-11-08 19:12:12,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 19:12:12,893 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 19:12:12,906 WARN L250 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_b183bfe6-d4dd-4a36-83ef-10cf515da375/sv-benchmarks/c/array-examples/standard_palindrome_ground.i[819,832] [2024-11-08 19:12:12,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 19:12:12,932 INFO L204 MainTranslator]: Completed translation [2024-11-08 19:12:12,933 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:12:12 WrapperNode [2024-11-08 19:12:12,933 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 19:12:12,934 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 19:12:12,934 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 19:12:12,935 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 19:12:12,943 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:12:12" (1/1) ... [2024-11-08 19:12:12,950 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:12:12" (1/1) ... [2024-11-08 19:12:12,968 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2024-11-08 19:12:12,969 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 19:12:12,969 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 19:12:12,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 19:12:12,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 19:12:12,981 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:12:12" (1/1) ... [2024-11-08 19:12:12,981 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:12:12" (1/1) ... [2024-11-08 19:12:12,983 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:12:12" (1/1) ... [2024-11-08 19:12:13,005 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-08 19:12:13,005 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:12:12" (1/1) ... [2024-11-08 19:12:13,005 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:12:12" (1/1) ... [2024-11-08 19:12:13,014 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:12:12" (1/1) ... [2024-11-08 19:12:13,020 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:12:12" (1/1) ... [2024-11-08 19:12:13,024 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:12:12" (1/1) ... [2024-11-08 19:12:13,025 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:12:12" (1/1) ... [2024-11-08 19:12:13,027 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 19:12:13,030 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 19:12:13,031 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 19:12:13,031 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 19:12:13,032 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:12:12" (1/1) ... [2024-11-08 19:12:13,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 19:12:13,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:12:13,062 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 19:12:13,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 19:12:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 19:12:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 19:12:13,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 19:12:13,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 19:12:13,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 19:12:13,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 19:12:13,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 19:12:13,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 19:12:13,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 19:12:13,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 19:12:13,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 19:12:13,168 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 19:12:13,170 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 19:12:13,309 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-08 19:12:13,310 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 19:12:13,326 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 19:12:13,326 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 19:12:13,327 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 07:12:13 BoogieIcfgContainer [2024-11-08 19:12:13,327 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 19:12:13,333 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 19:12:13,333 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 19:12:13,337 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 19:12:13,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 07:12:12" (1/3) ... [2024-11-08 19:12:13,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f0cb53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 07:12:13, skipping insertion in model container [2024-11-08 19:12:13,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:12:12" (2/3) ... [2024-11-08 19:12:13,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f0cb53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 07:12:13, skipping insertion in model container [2024-11-08 19:12:13,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 07:12:13" (3/3) ... [2024-11-08 19:12:13,343 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_palindrome_ground.i [2024-11-08 19:12:13,369 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 19:12:13,370 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 19:12:13,446 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 19:12:13,452 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;@193c0e52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 19:12:13,452 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 19:12:13,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:12:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 19:12:13,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:12:13,465 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:12:13,466 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:12:13,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:12:13,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1263664878, now seen corresponding path program 1 times [2024-11-08 19:12:13,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:12:13,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758964584] [2024-11-08 19:12:13,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:12:13,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:12:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:12:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:12:13,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:12:13,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758964584] [2024-11-08 19:12:13,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758964584] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:12:13,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:12:13,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 19:12:13,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343842588] [2024-11-08 19:12:13,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:12:13,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 19:12:13,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:12:13,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 19:12:13,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 19:12:13,761 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:12:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:12:13,814 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2024-11-08 19:12:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 19:12:13,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-08 19:12:13,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:12:13,826 INFO L225 Difference]: With dead ends: 36 [2024-11-08 19:12:13,826 INFO L226 Difference]: Without dead ends: 18 [2024-11-08 19:12:13,829 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 19:12:13,832 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 19:12:13,834 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 31 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 19:12:13,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-08 19:12:13,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-08 19:12:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:12:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-11-08 19:12:13,863 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2024-11-08 19:12:13,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:12:13,864 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-11-08 19:12:13,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:12:13,865 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-11-08 19:12:13,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 19:12:13,865 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:12:13,866 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:12:13,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 19:12:13,866 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:12:13,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:12:13,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1142958568, now seen corresponding path program 1 times [2024-11-08 19:12:13,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:12:13,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733499600] [2024-11-08 19:12:13,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:12:13,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:12:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:12:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:12:14,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:12:14,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733499600] [2024-11-08 19:12:14,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733499600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:12:14,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953644596] [2024-11-08 19:12:14,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:12:14,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:12:14,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:12:14,056 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:12:14,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 19:12:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:12:14,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 19:12:14,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:12:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:12:14,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:12:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:12:14,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953644596] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:12:14,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:12:14,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-08 19:12:14,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946453193] [2024-11-08 19:12:14,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:12:14,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 19:12:14,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:12:14,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 19:12:14,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 19:12:14,263 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:12:14,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:12:14,328 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2024-11-08 19:12:14,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 19:12:14,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-08 19:12:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:12:14,330 INFO L225 Difference]: With dead ends: 37 [2024-11-08 19:12:14,330 INFO L226 Difference]: Without dead ends: 25 [2024-11-08 19:12:14,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 19:12:14,332 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 19:12:14,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 27 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 19:12:14,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-08 19:12:14,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-08 19:12:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:12:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-08 19:12:14,339 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2024-11-08 19:12:14,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:12:14,340 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-08 19:12:14,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:12:14,340 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-08 19:12:14,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 19:12:14,341 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:12:14,341 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:12:14,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 19:12:14,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:12:14,546 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:12:14,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:12:14,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1769117452, now seen corresponding path program 2 times [2024-11-08 19:12:14,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:12:14,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983163144] [2024-11-08 19:12:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:12:14,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:12:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:12:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 19:12:14,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:12:14,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983163144] [2024-11-08 19:12:14,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983163144] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:12:14,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456475641] [2024-11-08 19:12:14,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 19:12:14,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:12:14,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:12:14,789 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:12:14,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 19:12:14,890 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 19:12:14,891 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:12:14,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 19:12:14,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:12:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 19:12:14,944 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:12:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 19:12:15,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456475641] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:12:15,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:12:15,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-08 19:12:15,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927466669] [2024-11-08 19:12:15,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:12:15,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 19:12:15,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:12:15,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 19:12:15,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-08 19:12:15,077 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:12:15,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:12:15,201 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2024-11-08 19:12:15,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 19:12:15,203 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 19:12:15,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:12:15,205 INFO L225 Difference]: With dead ends: 57 [2024-11-08 19:12:15,206 INFO L226 Difference]: Without dead ends: 43 [2024-11-08 19:12:15,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-08 19:12:15,208 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 19:12:15,210 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 43 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 19:12:15,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-08 19:12:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-08 19:12:15,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:12:15,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2024-11-08 19:12:15,219 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 22 [2024-11-08 19:12:15,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:12:15,219 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2024-11-08 19:12:15,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:12:15,220 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2024-11-08 19:12:15,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 19:12:15,221 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:12:15,221 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:12:15,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 19:12:15,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:12:15,422 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:12:15,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:12:15,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1728063705, now seen corresponding path program 3 times [2024-11-08 19:12:15,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:12:15,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535355011] [2024-11-08 19:12:15,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:12:15,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:12:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:12:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 19:12:15,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:12:15,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535355011] [2024-11-08 19:12:15,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535355011] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:12:15,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514126101] [2024-11-08 19:12:15,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 19:12:15,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:12:15,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:12:15,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:12:15,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 19:12:15,986 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-08 19:12:15,987 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:12:15,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 19:12:15,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:12:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 19:12:16,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:12:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 19:12:16,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514126101] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:12:16,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:12:16,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 20 [2024-11-08 19:12:16,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496183486] [2024-11-08 19:12:16,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:12:16,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 19:12:16,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:12:16,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 19:12:16,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2024-11-08 19:12:16,181 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:12:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:12:16,363 INFO L93 Difference]: Finished difference Result 101 states and 136 transitions. [2024-11-08 19:12:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 19:12:16,364 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-08 19:12:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:12:16,366 INFO L225 Difference]: With dead ends: 101 [2024-11-08 19:12:16,366 INFO L226 Difference]: Without dead ends: 81 [2024-11-08 19:12:16,366 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2024-11-08 19:12:16,367 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 19:12:16,368 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 44 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 19:12:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-08 19:12:16,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2024-11-08 19:12:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:12:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2024-11-08 19:12:16,379 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 40 [2024-11-08 19:12:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:12:16,379 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2024-11-08 19:12:16,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:12:16,380 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2024-11-08 19:12:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-08 19:12:16,382 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:12:16,382 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:12:16,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 19:12:16,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-08 19:12:16,583 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:12:16,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:12:16,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1931583304, now seen corresponding path program 4 times [2024-11-08 19:12:16,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:12:16,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585871652] [2024-11-08 19:12:16,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:12:16,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:12:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:12:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2024-11-08 19:12:17,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:12:17,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585871652] [2024-11-08 19:12:17,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585871652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:12:17,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793937185] [2024-11-08 19:12:17,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 19:12:17,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:12:17,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:12:17,355 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:12:17,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 19:12:17,558 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 19:12:17,560 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:12:17,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 19:12:17,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:12:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2024-11-08 19:12:17,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:12:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2024-11-08 19:12:18,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793937185] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:12:18,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:12:18,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2024-11-08 19:12:18,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989216284] [2024-11-08 19:12:18,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:12:18,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-08 19:12:18,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:12:18,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-08 19:12:18,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 19:12:18,386 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:12:18,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:12:18,700 INFO L93 Difference]: Finished difference Result 164 states and 187 transitions. [2024-11-08 19:12:18,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-08 19:12:18,701 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2024-11-08 19:12:18,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:12:18,702 INFO L225 Difference]: With dead ends: 164 [2024-11-08 19:12:18,702 INFO L226 Difference]: Without dead ends: 121 [2024-11-08 19:12:18,703 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 19:12:18,704 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 19:12:18,704 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 43 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 19:12:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-08 19:12:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2024-11-08 19:12:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:12:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2024-11-08 19:12:18,718 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 78 [2024-11-08 19:12:18,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:12:18,719 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2024-11-08 19:12:18,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:12:18,720 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2024-11-08 19:12:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-08 19:12:18,722 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:12:18,722 INFO L215 NwaCegarLoop]: trace histogram [36, 36, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:12:18,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 19:12:18,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:12:18,923 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:12:18,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:12:18,924 INFO L85 PathProgramCache]: Analyzing trace with hash -64240644, now seen corresponding path program 5 times [2024-11-08 19:12:18,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:12:18,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022597626] [2024-11-08 19:12:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:12:18,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:12:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:12:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-11-08 19:12:21,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:12:21,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022597626] [2024-11-08 19:12:21,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022597626] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:12:21,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859182817] [2024-11-08 19:12:21,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 19:12:21,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:12:21,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:12:21,016 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:12:21,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 19:19:33,581 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2024-11-08 19:19:33,582 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:19:33,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-08 19:19:33,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:19:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-11-08 19:19:33,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:19:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-11-08 19:19:36,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859182817] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:19:36,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:19:36,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 77 [2024-11-08 19:19:36,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416947144] [2024-11-08 19:19:36,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:19:36,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-08 19:19:36,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:19:36,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-08 19:19:36,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2024-11-08 19:19:36,184 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 77 states, 77 states have (on average 2.090909090909091) internal successors, (161), 77 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:19:36,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:19:36,954 INFO L93 Difference]: Finished difference Result 280 states and 340 transitions. [2024-11-08 19:19:36,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-08 19:19:36,957 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.090909090909091) internal successors, (161), 77 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2024-11-08 19:19:36,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:19:36,959 INFO L225 Difference]: With dead ends: 280 [2024-11-08 19:19:36,959 INFO L226 Difference]: Without dead ends: 235 [2024-11-08 19:19:36,961 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2024-11-08 19:19:36,962 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 154 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 19:19:36,962 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 51 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 19:19:36,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-11-08 19:19:36,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2024-11-08 19:19:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.0128755364806867) internal successors, (236), 233 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:19:36,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 236 transitions. [2024-11-08 19:19:36,982 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 236 transitions. Word has length 118 [2024-11-08 19:19:36,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:19:36,983 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 236 transitions. [2024-11-08 19:19:36,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.090909090909091) internal successors, (161), 77 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:19:36,983 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 236 transitions. [2024-11-08 19:19:36,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2024-11-08 19:19:36,986 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:19:36,986 INFO L215 NwaCegarLoop]: trace histogram [74, 74, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:19:37,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 19:19:37,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:19:37,187 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:19:37,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:19:37,188 INFO L85 PathProgramCache]: Analyzing trace with hash 851872441, now seen corresponding path program 6 times [2024-11-08 19:19:37,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:19:37,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805453303] [2024-11-08 19:19:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:19:37,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:19:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:19:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2024-11-08 19:19:44,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:19:44,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805453303] [2024-11-08 19:19:44,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805453303] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:19:44,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233467052] [2024-11-08 19:19:44,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 19:19:44,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:19:44,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:19:44,247 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:19:44,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b183bfe6-d4dd-4a36-83ef-10cf515da375/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process