./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB --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 64bit --witnessprinter.graph.data.programhash b64b813c3d856efe8cd859d380d09d4b682c371a0a165a5a5fe0d11dc206dad7 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:57:42,427 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:57:42,504 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-64bit-Automizer_Default.epf [2024-11-28 04:57:42,510 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:57:42,510 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:57:42,535 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:57:42,536 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:57:42,536 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:57:42,536 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:57:42,536 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:57:42,537 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:57:42,537 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:57:42,537 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:57:42,537 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:57:42,537 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:57:42,537 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:57:42,538 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:57:42,538 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:57:42,538 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:57:42,538 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:57:42,541 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:57:42,541 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:57:42,541 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:57:42,541 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:57:42,541 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:57:42,542 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:57:42,542 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:57:42,542 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:57:42,542 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:57:42,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:57:42,542 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:57:42,542 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:57:42,542 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:57:42,542 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:57:42,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:57:42,543 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:57:42,543 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:57:42,543 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:57:42,543 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:57:42,543 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:57:42,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:57:42,543 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:57:42,543 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:57:42,543 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:57:42,543 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:57:42,544 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b64b813c3d856efe8cd859d380d09d4b682c371a0a165a5a5fe0d11dc206dad7 [2024-11-28 04:57:42,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:57:42,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:57:42,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:57:42,863 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:57:42,863 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:57:42,867 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i [2024-11-28 04:57:45,910 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/data/c409d49e7/fc3a247b74d8447db6b98c11eda88b05/FLAGabb8fa1f8 [2024-11-28 04:57:46,556 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:57:46,557 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i [2024-11-28 04:57:46,603 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/data/c409d49e7/fc3a247b74d8447db6b98c11eda88b05/FLAGabb8fa1f8 [2024-11-28 04:57:46,620 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/data/c409d49e7/fc3a247b74d8447db6b98c11eda88b05 [2024-11-28 04:57:46,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:57:46,626 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:57:46,628 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:57:46,628 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:57:46,634 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:57:46,635 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:57:46" (1/1) ... [2024-11-28 04:57:46,638 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58615d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:46, skipping insertion in model container [2024-11-28 04:57:46,638 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:57:46" (1/1) ... [2024-11-28 04:57:46,745 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:57:47,038 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_800732ea-daec-4254-8ead-39e85dc822b2/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i[4493,4506] [2024-11-28 04:57:47,045 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_800732ea-daec-4254-8ead-39e85dc822b2/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i[4553,4566] [2024-11-28 04:57:48,139 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:48,140 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:48,140 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:48,141 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:48,143 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:48,160 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:48,161 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:48,163 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:48,164 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:49,159 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:49,159 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:49,191 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:57:49,258 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:57:49,276 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_800732ea-daec-4254-8ead-39e85dc822b2/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i[4493,4506] [2024-11-28 04:57:49,281 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_800732ea-daec-4254-8ead-39e85dc822b2/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i[4553,4566] [2024-11-28 04:57:49,330 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:49,330 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:49,330 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:49,331 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:49,331 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:49,347 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:49,349 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:49,350 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:49,351 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:49,539 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8588] [2024-11-28 04:57:49,541 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:49,542 WARN L1675 CHandler]: Possible shadowing of function index [2024-11-28 04:57:49,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:57:49,880 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:57:49,881 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:49 WrapperNode [2024-11-28 04:57:49,881 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:57:49,882 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:57:49,882 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:57:49,882 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:57:49,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:49" (1/1) ... [2024-11-28 04:57:49,987 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:49" (1/1) ... [2024-11-28 04:57:50,067 INFO L138 Inliner]: procedures = 670, calls = 2270, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 396 [2024-11-28 04:57:50,067 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:57:50,069 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:57:50,069 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:57:50,070 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:57:50,081 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:49" (1/1) ... [2024-11-28 04:57:50,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:49" (1/1) ... [2024-11-28 04:57:50,087 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:49" (1/1) ... [2024-11-28 04:57:50,123 INFO L175 MemorySlicer]: Split 279 memory accesses to 4 slices as follows [2, 257, 5, 15]. 92 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0]. The 260 writes are split as follows [0, 257, 0, 3]. [2024-11-28 04:57:50,127 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:49" (1/1) ... [2024-11-28 04:57:50,127 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:49" (1/1) ... [2024-11-28 04:57:50,171 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:49" (1/1) ... [2024-11-28 04:57:50,173 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:49" (1/1) ... [2024-11-28 04:57:50,177 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:49" (1/1) ... [2024-11-28 04:57:50,182 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:49" (1/1) ... [2024-11-28 04:57:50,185 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:49" (1/1) ... [2024-11-28 04:57:50,192 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:57:50,193 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:57:50,193 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:57:50,193 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:57:50,198 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:49" (1/1) ... [2024-11-28 04:57:50,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:57:50,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:57:50,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:57:50,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:57:50,305 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_c_str [2024-11-28 04:57:50,306 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_c_str [2024-11-28 04:57:50,306 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2024-11-28 04:57:50,306 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2024-11-28 04:57:50,307 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2024-11-28 04:57:50,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2024-11-28 04:57:50,307 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2024-11-28 04:57:50,307 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2024-11-28 04:57:50,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-11-28 04:57:50,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-11-28 04:57:50,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-11-28 04:57:50,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2024-11-28 04:57:50,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:57:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:57:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 04:57:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-28 04:57:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 04:57:50,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 04:57:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:57:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:57:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 04:57:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-28 04:57:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-28 04:57:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-28 04:57:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:57:50,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:57:50,311 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2024-11-28 04:57:50,311 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2024-11-28 04:57:50,311 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-28 04:57:50,311 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-28 04:57:50,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-28 04:57:50,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-28 04:57:50,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-28 04:57:50,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-28 04:57:50,311 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2024-11-28 04:57:50,311 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2024-11-28 04:57:50,311 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2024-11-28 04:57:50,311 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2024-11-28 04:57:50,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:57:50,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:57:50,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-28 04:57:50,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-28 04:57:50,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:57:50,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:57:50,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 04:57:50,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-28 04:57:50,648 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:57:50,651 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:57:58,231 INFO L? ?]: Removed 93 outVars from TransFormulas that were not future-live. [2024-11-28 04:57:58,231 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:57:58,249 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:57:58,249 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-28 04:57:58,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:58 BoogieIcfgContainer [2024-11-28 04:57:58,250 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:57:58,252 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:57:58,252 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:57:58,260 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:57:58,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:57:46" (1/3) ... [2024-11-28 04:57:58,261 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5211d73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:57:58, skipping insertion in model container [2024-11-28 04:57:58,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:49" (2/3) ... [2024-11-28 04:57:58,261 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5211d73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:57:58, skipping insertion in model container [2024-11-28 04:57:58,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:58" (3/3) ... [2024-11-28 04:57:58,263 INFO L128 eAbstractionObserver]: Analyzing ICFG aws_string_eq_c_str_harness.i [2024-11-28 04:57:58,281 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:57:58,283 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG aws_string_eq_c_str_harness.i that has 10 procedures, 107 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-28 04:57:58,362 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:57:58,380 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;@67129b71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:57:58,380 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:57:58,385 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 71 states have internal predecessors, (87), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-28 04:57:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 04:57:58,398 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:57:58,398 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:57:58,399 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:57:58,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:57:58,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1307493695, now seen corresponding path program 1 times [2024-11-28 04:57:58,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:57:58,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544903772] [2024-11-28 04:57:58,415 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:57:58,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:58:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:58:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:58:59,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:58:59,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544903772] [2024-11-28 04:58:59,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544903772] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:58:59,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:58:59,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:58:59,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714780571] [2024-11-28 04:58:59,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:58:59,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:58:59,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:58:59,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:58:59,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:58:59,364 INFO L87 Difference]: Start difference. First operand has 107 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 71 states have internal predecessors, (87), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:58:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:58:59,414 INFO L93 Difference]: Finished difference Result 205 states and 281 transitions. [2024-11-28 04:58:59,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 04:58:59,416 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2024-11-28 04:58:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:58:59,425 INFO L225 Difference]: With dead ends: 205 [2024-11-28 04:58:59,426 INFO L226 Difference]: Without dead ends: 101 [2024-11-28 04:58:59,430 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:58:59,435 INFO L435 NwaCegarLoop]: 136 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:58:59,437 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:58:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-28 04:58:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-28 04:58:59,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 66 states have internal predecessors, (77), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-28 04:58:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2024-11-28 04:58:59,495 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 36 [2024-11-28 04:58:59,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:58:59,499 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2024-11-28 04:58:59,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:58:59,499 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2024-11-28 04:58:59,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 04:58:59,503 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:58:59,504 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:58:59,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:58:59,504 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:58:59,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:58:59,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1298529859, now seen corresponding path program 1 times [2024-11-28 04:58:59,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:58:59,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55230576] [2024-11-28 04:58:59,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:58:59,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:59:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:00:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:00:01,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:00:01,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55230576] [2024-11-28 05:00:01,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55230576] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:00:01,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:00:01,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:00:01,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197359838] [2024-11-28 05:00:01,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:00:01,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:00:01,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:00:01,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:00:01,717 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:00:01,717 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 05:00:01,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:00:01,864 INFO L93 Difference]: Finished difference Result 148 states and 186 transitions. [2024-11-28 05:00:01,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:00:01,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2024-11-28 05:00:01,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:00:01,870 INFO L225 Difference]: With dead ends: 148 [2024-11-28 05:00:01,870 INFO L226 Difference]: Without dead ends: 101 [2024-11-28 05:00:01,870 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:00:01,874 INFO L435 NwaCegarLoop]: 127 mSDtfsCounter, 6 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:00:01,874 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 374 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:00:01,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-28 05:00:01,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-28 05:00:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 66 states have internal predecessors, (76), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-28 05:00:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2024-11-28 05:00:01,899 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 36 [2024-11-28 05:00:01,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:00:01,900 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2024-11-28 05:00:01,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 05:00:01,900 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2024-11-28 05:00:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 05:00:01,901 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:00:01,902 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:00:01,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:00:01,902 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:00:01,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:00:01,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1909598513, now seen corresponding path program 1 times [2024-11-28 05:00:01,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:00:01,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548423146] [2024-11-28 05:00:01,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:00:01,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:00:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-28 05:01:02,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:02,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548423146] [2024-11-28 05:01:02,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548423146] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:02,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:02,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 05:01:02,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600703720] [2024-11-28 05:01:02,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:02,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:01:02,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:02,055 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:01:02,055 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:01:02,055 INFO L87 Difference]: Start difference. First operand 101 states and 127 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-28 05:01:02,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:02,460 INFO L93 Difference]: Finished difference Result 139 states and 170 transitions. [2024-11-28 05:01:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:01:02,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 64 [2024-11-28 05:01:02,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:02,462 INFO L225 Difference]: With dead ends: 139 [2024-11-28 05:01:02,462 INFO L226 Difference]: Without dead ends: 102 [2024-11-28 05:01:02,463 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:01:02,464 INFO L435 NwaCegarLoop]: 120 mSDtfsCounter, 5 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:02,464 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 822 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:01:02,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-28 05:01:02,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2024-11-28 05:01:02,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 66 states have internal predecessors, (75), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-28 05:01:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 126 transitions. [2024-11-28 05:01:02,475 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 126 transitions. Word has length 64 [2024-11-28 05:01:02,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:02,475 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 126 transitions. [2024-11-28 05:01:02,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-28 05:01:02,475 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 126 transitions. [2024-11-28 05:01:02,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-28 05:01:02,477 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:02,477 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:02,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 05:01:02,478 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:01:02,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:02,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1074535689, now seen corresponding path program 1 times [2024-11-28 05:01:02,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:02,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814630833] [2024-11-28 05:01:02,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:02,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-28 05:02:00,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:00,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814630833] [2024-11-28 05:02:00,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814630833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:00,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:00,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:02:00,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283481469] [2024-11-28 05:02:00,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:00,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:02:00,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:00,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:02:00,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:02:00,965 INFO L87 Difference]: Start difference. First operand 101 states and 126 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-28 05:02:01,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:01,107 INFO L93 Difference]: Finished difference Result 159 states and 199 transitions. [2024-11-28 05:02:01,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:02:01,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 65 [2024-11-28 05:02:01,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:01,111 INFO L225 Difference]: With dead ends: 159 [2024-11-28 05:02:01,111 INFO L226 Difference]: Without dead ends: 101 [2024-11-28 05:02:01,111 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:02:01,115 INFO L435 NwaCegarLoop]: 124 mSDtfsCounter, 4 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:01,116 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 365 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:02:01,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-28 05:02:01,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-28 05:02:01,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 66 states have internal predecessors, (74), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-28 05:02:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2024-11-28 05:02:01,137 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 65 [2024-11-28 05:02:01,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:01,137 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2024-11-28 05:02:01,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-28 05:02:01,138 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2024-11-28 05:02:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-28 05:02:01,141 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:01,141 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:01,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 05:02:01,142 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:01,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:01,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1205065792, now seen corresponding path program 1 times [2024-11-28 05:02:01,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:01,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479825370] [2024-11-28 05:02:01,143 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:01,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:03:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-28 05:03:01,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:01,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479825370] [2024-11-28 05:03:01,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479825370] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:03:01,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:03:01,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2024-11-28 05:03:01,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261797911] [2024-11-28 05:03:01,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:03:01,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:03:01,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:01,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:03:01,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:03:01,632 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 12 states have internal predecessors, (44), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 9 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-28 05:03:03,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:03:03,366 INFO L93 Difference]: Finished difference Result 138 states and 167 transitions. [2024-11-28 05:03:03,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 05:03:03,367 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 12 states have internal predecessors, (44), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 9 states have call predecessors, (14), 6 states have call successors, (14) Word has length 99 [2024-11-28 05:03:03,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:03:03,369 INFO L225 Difference]: With dead ends: 138 [2024-11-28 05:03:03,369 INFO L226 Difference]: Without dead ends: 101 [2024-11-28 05:03:03,370 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2024-11-28 05:03:03,371 INFO L435 NwaCegarLoop]: 110 mSDtfsCounter, 19 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:03:03,371 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1177 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 05:03:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-28 05:03:03,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-28 05:03:03,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.123076923076923) internal successors, (73), 66 states have internal predecessors, (73), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-28 05:03:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2024-11-28 05:03:03,382 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 99 [2024-11-28 05:03:03,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:03:03,383 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2024-11-28 05:03:03,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 12 states have internal predecessors, (44), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 9 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-28 05:03:03,384 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2024-11-28 05:03:03,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-28 05:03:03,387 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:03:03,387 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:03,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 05:03:03,388 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:03:03,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:03,388 INFO L85 PathProgramCache]: Analyzing trace with hash -637333488, now seen corresponding path program 1 times [2024-11-28 05:03:03,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:03,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813346422] [2024-11-28 05:03:03,389 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:03:03,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:04:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-11-28 05:04:02,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:02,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813346422] [2024-11-28 05:04:02,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813346422] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:02,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509754121] [2024-11-28 05:04:02,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:04:02,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:02,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:02,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:02,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:05:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:05:03,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 4045 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 05:05:03,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-28 05:05:04,347 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:05:04,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509754121] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:05:04,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:05:04,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2024-11-28 05:05:04,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96902494] [2024-11-28 05:05:04,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:05:04,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:05:04,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:04,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:05:04,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:05:04,350 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-28 05:05:04,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:05:04,655 INFO L93 Difference]: Finished difference Result 155 states and 189 transitions. [2024-11-28 05:05:04,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:05:04,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 117 [2024-11-28 05:05:04,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:05:04,658 INFO L225 Difference]: With dead ends: 155 [2024-11-28 05:05:04,658 INFO L226 Difference]: Without dead ends: 101 [2024-11-28 05:05:04,659 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:05:04,660 INFO L435 NwaCegarLoop]: 121 mSDtfsCounter, 1 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:05:04,660 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 355 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:05:04,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-28 05:05:04,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-28 05:05:04,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 66 states have internal predecessors, (72), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-28 05:05:04,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2024-11-28 05:05:04,672 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 117 [2024-11-28 05:05:04,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:05:04,673 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2024-11-28 05:05:04,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-28 05:05:04,673 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2024-11-28 05:05:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-28 05:05:04,677 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:05:04,677 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:04,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:05:04,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 05:05:04,881 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:05:04,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:04,882 INFO L85 PathProgramCache]: Analyzing trace with hash -850813917, now seen corresponding path program 1 times [2024-11-28 05:05:04,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:04,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354969] [2024-11-28 05:05:04,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:05:04,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:06:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:06:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-28 05:06:41,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:06:41,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354969] [2024-11-28 05:06:41,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354969] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:06:41,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38573996] [2024-11-28 05:06:41,313 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:06:41,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:41,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:06:41,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:06:41,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:07:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:07:39,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 4073 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-28 05:07:39,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:07:39,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 43 [2024-11-28 05:07:39,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:07:39,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2024-11-28 05:07:39,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-28 05:07:39,659 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 05:07:39,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2024-11-28 05:08:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 05:08:32,337 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:43,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38573996] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:43,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:08:43,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 36] total 60 [2024-11-28 05:08:43,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975271662] [2024-11-28 05:08:43,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:43,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-28 05:08:43,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:43,762 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-28 05:08:43,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=4671, Unknown=0, NotChecked=0, Total=4970 [2024-11-28 05:08:43,765 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand has 60 states, 53 states have (on average 2.188679245283019) internal successors, (116), 50 states have internal predecessors, (116), 18 states have call successors, (32), 5 states have call predecessors, (32), 15 states have return successors, (31), 18 states have call predecessors, (31), 16 states have call successors, (31) [2024-11-28 05:09:18,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:18,637 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2024-11-28 05:09:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-28 05:09:18,638 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 53 states have (on average 2.188679245283019) internal successors, (116), 50 states have internal predecessors, (116), 18 states have call successors, (32), 5 states have call predecessors, (32), 15 states have return successors, (31), 18 states have call predecessors, (31), 16 states have call successors, (31) Word has length 126 [2024-11-28 05:09:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:18,640 INFO L225 Difference]: With dead ends: 198 [2024-11-28 05:09:18,640 INFO L226 Difference]: Without dead ends: 196 [2024-11-28 05:09:18,642 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 102 SyntacticMatches, 11 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2519 ImplicationChecksByTransitivity, 61.8s TimeCoverageRelationStatistics Valid=576, Invalid=8544, Unknown=0, NotChecked=0, Total=9120 [2024-11-28 05:09:18,643 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 203 mSDsluCounter, 2534 mSDsCounter, 0 mSdLazyCounter, 2191 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 2636 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:18,643 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 2636 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2191 Invalid, 0 Unknown, 0 Unchecked, 17.2s Time] [2024-11-28 05:09:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-28 05:09:18,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 178. [2024-11-28 05:09:18,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 121 states have internal predecessors, (131), 36 states have call successors, (36), 21 states have call predecessors, (36), 23 states have return successors, (36), 35 states have call predecessors, (36), 34 states have call successors, (36) [2024-11-28 05:09:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 203 transitions. [2024-11-28 05:09:18,707 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 203 transitions. Word has length 126 [2024-11-28 05:09:18,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:18,710 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 203 transitions. [2024-11-28 05:09:18,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 53 states have (on average 2.188679245283019) internal successors, (116), 50 states have internal predecessors, (116), 18 states have call successors, (32), 5 states have call predecessors, (32), 15 states have return successors, (31), 18 states have call predecessors, (31), 16 states have call successors, (31) [2024-11-28 05:09:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 203 transitions. [2024-11-28 05:09:18,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-28 05:09:18,716 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:18,717 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:18,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 05:09:18,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 05:09:18,918 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:09:18,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:18,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1660160543, now seen corresponding path program 1 times [2024-11-28 05:09:18,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:18,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436128628] [2024-11-28 05:09:18,918 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:18,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:10:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-11-28 05:10:18,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:18,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436128628] [2024-11-28 05:10:18,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436128628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:18,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496090200] [2024-11-28 05:10:18,584 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:10:18,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:18,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:18,586 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:18,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:11:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:16,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 4068 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 05:11:16,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-11-28 05:11:20,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-11-28 05:11:25,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496090200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:25,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:25,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2024-11-28 05:11:25,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423325928] [2024-11-28 05:11:25,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:25,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 05:11:25,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:25,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 05:11:25,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 05:11:25,638 INFO L87 Difference]: Start difference. First operand 178 states and 203 transitions. Second operand has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 29 states have internal predecessors, (113), 8 states have call successors, (39), 2 states have call predecessors, (39), 9 states have return successors, (42), 14 states have call predecessors, (42), 7 states have call successors, (42) [2024-11-28 05:11:31,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:11:31,826 INFO L93 Difference]: Finished difference Result 264 states and 298 transitions. [2024-11-28 05:11:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:11:31,827 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 29 states have internal predecessors, (113), 8 states have call successors, (39), 2 states have call predecessors, (39), 9 states have return successors, (42), 14 states have call predecessors, (42), 7 states have call successors, (42) Word has length 126 [2024-11-28 05:11:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:11:31,829 INFO L225 Difference]: With dead ends: 264 [2024-11-28 05:11:31,829 INFO L226 Difference]: Without dead ends: 185 [2024-11-28 05:11:31,830 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=166, Invalid=2090, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 05:11:31,831 INFO L435 NwaCegarLoop]: 113 mSDtfsCounter, 42 mSDsluCounter, 3029 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3142 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:11:31,831 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3142 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-28 05:11:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-28 05:11:31,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 174. [2024-11-28 05:11:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 118 states have internal predecessors, (125), 35 states have call successors, (35), 21 states have call predecessors, (35), 22 states have return successors, (34), 34 states have call predecessors, (34), 33 states have call successors, (34) [2024-11-28 05:11:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 194 transitions. [2024-11-28 05:11:31,874 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 194 transitions. Word has length 126 [2024-11-28 05:11:31,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:11:31,875 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 194 transitions. [2024-11-28 05:11:31,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 29 states have internal predecessors, (113), 8 states have call successors, (39), 2 states have call predecessors, (39), 9 states have return successors, (42), 14 states have call predecessors, (42), 7 states have call successors, (42) [2024-11-28 05:11:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 194 transitions. [2024-11-28 05:11:31,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-28 05:11:31,876 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:11:31,876 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:31,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 05:11:32,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800732ea-daec-4254-8ead-39e85dc822b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:32,077 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:11:32,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:32,077 INFO L85 PathProgramCache]: Analyzing trace with hash 770120567, now seen corresponding path program 1 times [2024-11-28 05:11:32,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:32,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228443728] [2024-11-28 05:11:32,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:32,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms