./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/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_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/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 32bit --witnessprinter.graph.data.programhash e972d7fe67c03faae458b4aeefde235726c38e34da23998883d4b544999b0f51 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:02:17,667 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:02:17,756 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 20:02:17,763 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:02:17,763 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:02:17,794 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:02:17,795 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:02:17,795 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:02:17,796 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:02:17,796 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:02:17,796 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:02:17,796 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:02:17,797 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:02:17,797 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:02:17,797 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:02:17,797 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:02:17,798 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:02:17,798 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:02:17,799 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:02:17,799 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:02:17,799 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:02:17,799 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:02:17,799 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:02:17,799 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:02:17,800 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:02:17,800 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:02:17,800 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:02:17,800 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:02:17,800 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:02:17,800 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:02:17,800 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:02:17,800 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:02:17,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:02:17,801 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:02:17,801 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:02:17,801 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:02:17,801 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:02:17,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:02:17,802 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:02:17,802 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:02:17,802 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:02:17,802 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:02:17,804 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:02:17,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:02:17,804 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:02:17,805 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:02:17,805 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:02:17,805 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:02:17,805 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_d9648700-2084-46d7-b919-0322b3153c6f/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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e972d7fe67c03faae458b4aeefde235726c38e34da23998883d4b544999b0f51 [2024-11-27 20:02:18,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:02:18,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:02:18,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:02:18,190 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:02:18,190 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:02:18,191 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-11-27 20:02:21,426 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/data/7d35f9baa/e33cae1a40f84b43a844c5435438cb45/FLAGc11978816 [2024-11-27 20:02:21,809 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:02:21,810 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c [2024-11-27 20:02:21,838 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/data/7d35f9baa/e33cae1a40f84b43a844c5435438cb45/FLAGc11978816 [2024-11-27 20:02:21,873 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/data/7d35f9baa/e33cae1a40f84b43a844c5435438cb45 [2024-11-27 20:02:21,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:02:21,882 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:02:21,883 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:02:21,886 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:02:21,893 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:02:21,894 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:02:21" (1/1) ... [2024-11-27 20:02:21,898 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ed90b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:02:21, skipping insertion in model container [2024-11-27 20:02:21,898 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:02:21" (1/1) ... [2024-11-27 20:02:21,923 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:02:22,101 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_d9648700-2084-46d7-b919-0322b3153c6f/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c[1106,1119] [2024-11-27 20:02:22,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:02:22,167 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:02:22,188 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_d9648700-2084-46d7-b919-0322b3153c6f/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm1.c[1106,1119] [2024-11-27 20:02:22,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:02:22,236 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:02:22,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:02:22 WrapperNode [2024-11-27 20:02:22,237 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:02:22,238 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:02:22,239 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:02:22,239 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:02:22,251 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:02:22" (1/1) ... [2024-11-27 20:02:22,266 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:02:22" (1/1) ... [2024-11-27 20:02:22,305 INFO L138 Inliner]: procedures = 18, calls = 104, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 95 [2024-11-27 20:02:22,306 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:02:22,306 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:02:22,306 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:02:22,306 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:02:22,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:02:22" (1/1) ... [2024-11-27 20:02:22,320 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:02:22" (1/1) ... [2024-11-27 20:02:22,325 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:02:22" (1/1) ... [2024-11-27 20:02:22,373 INFO L175 MemorySlicer]: Split 66 memory accesses to 8 slices as follows [8, 2, 8, 7, 11, 13, 9, 8]. 20 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [0, 2, 0, 7, 0, 0, 0, 0]. The 10 writes are split as follows [2, 0, 2, 0, 2, 2, 1, 1]. [2024-11-27 20:02:22,377 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:02:22" (1/1) ... [2024-11-27 20:02:22,377 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:02:22" (1/1) ... [2024-11-27 20:02:22,388 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:02:22" (1/1) ... [2024-11-27 20:02:22,389 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:02:22" (1/1) ... [2024-11-27 20:02:22,392 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:02:22" (1/1) ... [2024-11-27 20:02:22,394 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:02:22" (1/1) ... [2024-11-27 20:02:22,396 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:02:22" (1/1) ... [2024-11-27 20:02:22,400 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:02:22,401 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:02:22,401 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:02:22,401 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:02:22,403 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:02:22" (1/1) ... [2024-11-27 20:02:22,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:02:22,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:02:22,441 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:02:22,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:02:22,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:02:22,480 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_38_0 [2024-11-27 20:02:22,481 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_38_0 [2024-11-27 20:02:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_48_to_53_0 [2024-11-27 20:02:22,481 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_48_to_53_0 [2024-11-27 20:02:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-27 20:02:22,482 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-27 20:02:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:02:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 20:02:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 20:02:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-27 20:02:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-27 20:02:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-27 20:02:22,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-27 20:02:22,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-27 20:02:22,483 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_45_0 [2024-11-27 20:02:22,483 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_45_0 [2024-11-27 20:02:22,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 20:02:22,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 20:02:22,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 20:02:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-27 20:02:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-27 20:02:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-27 20:02:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-27 20:02:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-27 20:02:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-27 20:02:22,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:02:22,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:02:22,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 20:02:22,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 20:02:22,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-27 20:02:22,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-27 20:02:22,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-27 20:02:22,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-27 20:02:22,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-27 20:02:22,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-27 20:02:22,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 20:02:22,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 20:02:22,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 20:02:22,664 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:02:22,666 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:02:23,143 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-27 20:02:23,143 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:02:23,160 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:02:23,161 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-27 20:02:23,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:02:23 BoogieIcfgContainer [2024-11-27 20:02:23,162 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:02:23,165 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:02:23,166 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:02:23,173 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:02:23,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:02:21" (1/3) ... [2024-11-27 20:02:23,175 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d980aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:02:23, skipping insertion in model container [2024-11-27 20:02:23,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:02:22" (2/3) ... [2024-11-27 20:02:23,175 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d980aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:02:23, skipping insertion in model container [2024-11-27 20:02:23,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:02:23" (3/3) ... [2024-11-27 20:02:23,177 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_lcm1.c [2024-11-27 20:02:23,199 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:02:23,202 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_lcm1.c that has 6 procedures, 55 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-27 20:02:23,289 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:02:23,311 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;@69ee2665, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:02:23,311 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 20:02:23,319 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-27 20:02:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-27 20:02:23,329 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:02:23,330 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:02:23,330 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:02:23,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:02:23,337 INFO L85 PathProgramCache]: Analyzing trace with hash 895026989, now seen corresponding path program 1 times [2024-11-27 20:02:23,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:02:23,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179843020] [2024-11-27 20:02:23,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:02:23,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:02:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:02:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 20:02:23,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:02:23,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179843020] [2024-11-27 20:02:23,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179843020] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:02:23,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051299543] [2024-11-27 20:02:23,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:02:23,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:02:23,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:02:23,692 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:02:23,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:02:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:02:23,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-27 20:02:23,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:02:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 20:02:24,017 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:02:24,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051299543] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:02:24,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:02:24,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-27 20:02:24,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175260504] [2024-11-27 20:02:24,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:02:24,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 20:02:24,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:02:24,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 20:02:24,057 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 20:02:24,060 INFO L87 Difference]: Start difference. First operand has 55 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:02:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:02:24,106 INFO L93 Difference]: Finished difference Result 107 states and 155 transitions. [2024-11-27 20:02:24,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 20:02:24,110 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-11-27 20:02:24,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:02:24,120 INFO L225 Difference]: With dead ends: 107 [2024-11-27 20:02:24,121 INFO L226 Difference]: Without dead ends: 51 [2024-11-27 20:02:24,125 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 20:02:24,129 INFO L435 NwaCegarLoop]: 67 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, 67 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 [2024-11-27 20:02:24,130 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:02:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-27 20:02:24,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-27 20:02:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 34 states have internal predecessors, (34), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-27 20:02:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2024-11-27 20:02:24,196 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 33 [2024-11-27 20:02:24,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:02:24,196 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2024-11-27 20:02:24,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:02:24,197 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2024-11-27 20:02:24,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-27 20:02:24,200 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:02:24,200 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:02:24,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 20:02:24,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-27 20:02:24,406 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:02:24,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:02:24,408 INFO L85 PathProgramCache]: Analyzing trace with hash -411491275, now seen corresponding path program 1 times [2024-11-27 20:02:24,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:02:24,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680147029] [2024-11-27 20:02:24,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:02:24,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:02:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 20:02:24,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477444762] [2024-11-27 20:02:24,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:02:24,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:02:24,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:02:24,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:02:24,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:02:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:02:25,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-27 20:02:25,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:02:25,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:02:25,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:02:25,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:02:25,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:02:25,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:02:25,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:02:25,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:02:25,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:02:25,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:02:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 20:02:25,568 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:02:25,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:02:25,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680147029] [2024-11-27 20:02:25,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:02:25,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477444762] [2024-11-27 20:02:25,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477444762] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:02:25,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:02:25,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-27 20:02:25,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220530872] [2024-11-27 20:02:25,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:02:25,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:02:25,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:02:25,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:02:25,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:02:25,574 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 20:02:26,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:02:26,021 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2024-11-27 20:02:26,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:02:26,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2024-11-27 20:02:26,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:02:26,024 INFO L225 Difference]: With dead ends: 66 [2024-11-27 20:02:26,025 INFO L226 Difference]: Without dead ends: 64 [2024-11-27 20:02:26,025 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:02:26,026 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 14 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:02:26,027 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 334 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:02:26,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-27 20:02:26,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2024-11-27 20:02:26,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.131578947368421) internal successors, (43), 42 states have internal predecessors, (43), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2024-11-27 20:02:26,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2024-11-27 20:02:26,042 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 33 [2024-11-27 20:02:26,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:02:26,043 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2024-11-27 20:02:26,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 20:02:26,043 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2024-11-27 20:02:26,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 20:02:26,044 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:02:26,044 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-11-27 20:02:26,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 20:02:26,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:02:26,245 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:02:26,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:02:26,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1464506496, now seen corresponding path program 1 times [2024-11-27 20:02:26,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:02:26,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507790601] [2024-11-27 20:02:26,246 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:02:26,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:02:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 20:02:26,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431408410] [2024-11-27 20:02:26,371 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:02:26,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:02:26,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:02:26,373 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:02:26,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:02:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:02:26,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-11-27 20:02:26,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:02:26,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:02:26,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:02:26,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:02:26,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:02:26,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:02:27,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:02:27,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:02:27,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:02:27,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:02:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 20:02:27,483 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:02:29,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:02:29,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507790601] [2024-11-27 20:02:29,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:02:29,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431408410] [2024-11-27 20:02:29,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431408410] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:02:29,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:02:29,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-11-27 20:02:29,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281943275] [2024-11-27 20:02:29,685 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 20:02:29,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 20:02:29,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:02:29,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 20:02:29,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:02:29,687 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 20:02:31,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:02:31,638 INFO L93 Difference]: Finished difference Result 112 states and 139 transitions. [2024-11-27 20:02:31,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:02:31,642 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-11-27 20:02:31,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:02:31,645 INFO L225 Difference]: With dead ends: 112 [2024-11-27 20:02:31,645 INFO L226 Difference]: Without dead ends: 110 [2024-11-27 20:02:31,646 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-27 20:02:31,647 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 62 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:02:31,648 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 311 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-27 20:02:31,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-27 20:02:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2024-11-27 20:02:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 72 states have internal predecessors, (76), 26 states have call successors, (26), 13 states have call predecessors, (26), 13 states have return successors, (30), 24 states have call predecessors, (30), 24 states have call successors, (30) [2024-11-27 20:02:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 132 transitions. [2024-11-27 20:02:31,701 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 132 transitions. Word has length 43 [2024-11-27 20:02:31,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:02:31,702 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 132 transitions. [2024-11-27 20:02:31,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 20:02:31,703 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 132 transitions. [2024-11-27 20:02:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 20:02:31,704 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:02:31,704 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-11-27 20:02:31,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 20:02:31,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:02:31,905 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:02:31,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:02:31,906 INFO L85 PathProgramCache]: Analyzing trace with hash -391399748, now seen corresponding path program 1 times [2024-11-27 20:02:31,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:02:31,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554438084] [2024-11-27 20:02:31,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:02:31,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:02:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 20:02:32,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114561021] [2024-11-27 20:02:32,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:02:32,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:02:32,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:02:32,086 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:02:32,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9648700-2084-46d7-b919-0322b3153c6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process