./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy4_ground-2.i --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_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/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_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy4_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/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_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/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 4a66002bd28db929747d199b9986ccd34ccce90ecf5386b8e2342838dba13a02 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:05:35,750 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:05:35,876 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 05:05:35,888 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:05:35,888 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:05:35,917 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:05:35,918 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:05:35,918 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:05:35,919 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:05:35,919 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:05:35,919 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:05:35,919 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:05:35,920 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:05:35,920 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:05:35,920 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:05:35,920 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:05:35,920 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 05:05:35,920 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:05:35,921 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:05:35,921 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:05:35,921 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:05:35,921 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 05:05:35,921 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:05:35,921 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 05:05:35,921 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:05:35,921 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 05:05:35,921 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:05:35,922 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:05:35,922 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:05:35,922 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:05:35,922 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:05:35,922 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:05:35,922 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:05:35,922 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:05:35,922 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:05:35,923 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:05:35,923 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:05:35,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:05:35,923 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:05:35,923 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:05:35,923 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 05:05:35,924 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 05:05:35,924 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:05:35,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:05:35,925 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:05:35,925 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:05:35,925 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:05:35,925 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:05:35,925 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_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/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 -> 4a66002bd28db929747d199b9986ccd34ccce90ecf5386b8e2342838dba13a02 [2024-11-28 05:05:36,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:05:36,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:05:36,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:05:36,336 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:05:36,336 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:05:36,339 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-examples/standard_copy4_ground-2.i [2024-11-28 05:05:37,191 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/data/de560b87a/986b25dc6aed42bba8448a233fa8b1e4/FLAGc9fe43b8b [2024-11-28 05:05:42,594 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:05:42,595 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/sv-benchmarks/c/array-examples/standard_copy4_ground-2.i [2024-11-28 05:05:42,605 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/data/de560b87a/986b25dc6aed42bba8448a233fa8b1e4/FLAGc9fe43b8b [2024-11-28 05:05:42,625 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/data/de560b87a/986b25dc6aed42bba8448a233fa8b1e4 [2024-11-28 05:05:42,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:05:42,630 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:05:42,631 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:05:42,632 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:05:42,638 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:05:42,639 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:05:42" (1/1) ... [2024-11-28 05:05:42,640 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f226f49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:42, skipping insertion in model container [2024-11-28 05:05:42,640 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:05:42" (1/1) ... [2024-11-28 05:05:42,660 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:05:42,873 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_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/sv-benchmarks/c/array-examples/standard_copy4_ground-2.i[816,829] [2024-11-28 05:05:42,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:05:42,926 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:05:42,940 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_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/sv-benchmarks/c/array-examples/standard_copy4_ground-2.i[816,829] [2024-11-28 05:05:42,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:05:42,971 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:05:42,972 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:42 WrapperNode [2024-11-28 05:05:42,972 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:05:42,975 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:05:42,975 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:05:42,975 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:05:42,984 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:42" (1/1) ... [2024-11-28 05:05:42,998 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:42" (1/1) ... [2024-11-28 05:05:43,031 INFO L138 Inliner]: procedures = 16, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 110 [2024-11-28 05:05:43,032 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:05:43,032 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:05:43,033 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:05:43,033 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:05:43,041 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:42" (1/1) ... [2024-11-28 05:05:43,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:42" (1/1) ... [2024-11-28 05:05:43,044 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:42" (1/1) ... [2024-11-28 05:05:43,060 INFO L175 MemorySlicer]: Split 14 memory accesses to 6 slices as follows [2, 3, 3, 2, 2, 2]. 21 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 2, 1, 1, 1]. [2024-11-28 05:05:43,061 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:42" (1/1) ... [2024-11-28 05:05:43,061 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:42" (1/1) ... [2024-11-28 05:05:43,068 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:42" (1/1) ... [2024-11-28 05:05:43,069 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:42" (1/1) ... [2024-11-28 05:05:43,074 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:42" (1/1) ... [2024-11-28 05:05:43,076 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:42" (1/1) ... [2024-11-28 05:05:43,077 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:42" (1/1) ... [2024-11-28 05:05:43,080 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:05:43,081 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:05:43,081 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:05:43,081 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:05:43,082 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:42" (1/1) ... [2024-11-28 05:05:43,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:05:43,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:43,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:05:43,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:05:43,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:05:43,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:05:43,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 05:05:43,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 05:05:43,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-28 05:05:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-28 05:05:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-28 05:05:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 05:05:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 05:05:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 05:05:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-28 05:05:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-28 05:05:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-28 05:05:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-28 05:05:43,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:05:43,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:05:43,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 05:05:43,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 05:05:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 05:05:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-28 05:05:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-28 05:05:43,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-28 05:05:43,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 05:05:43,333 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:05:43,335 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:05:43,622 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-28 05:05:43,622 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:05:43,642 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:05:43,643 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 05:05:43,643 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:05:43 BoogieIcfgContainer [2024-11-28 05:05:43,643 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:05:43,646 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:05:43,647 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:05:43,656 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:05:43,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:05:42" (1/3) ... [2024-11-28 05:05:43,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72922c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:05:43, skipping insertion in model container [2024-11-28 05:05:43,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:05:42" (2/3) ... [2024-11-28 05:05:43,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72922c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:05:43, skipping insertion in model container [2024-11-28 05:05:43,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:05:43" (3/3) ... [2024-11-28 05:05:43,660 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-2.i [2024-11-28 05:05:43,682 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:05:43,687 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_copy4_ground-2.i that has 1 procedures, 27 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-28 05:05:43,767 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:05:43,791 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;@5542a328, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:05:43,792 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 05:05:43,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:43,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 05:05:43,807 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:05:43,808 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:43,808 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:05:43,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:43,817 INFO L85 PathProgramCache]: Analyzing trace with hash 872087495, now seen corresponding path program 1 times [2024-11-28 05:05:43,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:43,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882130599] [2024-11-28 05:05:43,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:05:43,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:05:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:05:44,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:44,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882130599] [2024-11-28 05:05:44,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882130599] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:05:44,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:05:44,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:05:44,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760596037] [2024-11-28 05:05:44,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:05:44,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:05:44,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:44,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:05:44,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:05:44,198 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:44,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:05:44,241 INFO L93 Difference]: Finished difference Result 52 states and 76 transitions. [2024-11-28 05:05:44,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:05:44,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-28 05:05:44,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:05:44,254 INFO L225 Difference]: With dead ends: 52 [2024-11-28 05:05:44,255 INFO L226 Difference]: Without dead ends: 25 [2024-11-28 05:05:44,259 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:05:44,261 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:05:44,262 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 57 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:05:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-28 05:05:44,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-11-28 05:05:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2024-11-28 05:05:44,295 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2024-11-28 05:05:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:05:44,295 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2024-11-28 05:05:44,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:44,295 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2024-11-28 05:05:44,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 05:05:44,296 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:05:44,296 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:44,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:05:44,296 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:05:44,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:44,297 INFO L85 PathProgramCache]: Analyzing trace with hash -512731893, now seen corresponding path program 1 times [2024-11-28 05:05:44,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:44,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427231663] [2024-11-28 05:05:44,297 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:05:44,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:05:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:05:44,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:44,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427231663] [2024-11-28 05:05:44,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427231663] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:44,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089375793] [2024-11-28 05:05:44,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:05:44,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:44,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:44,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:44,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:05:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:05:44,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-28 05:05:44,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:05:44,707 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:05:44,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089375793] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:05:44,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:05:44,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-28 05:05:44,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367688827] [2024-11-28 05:05:44,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:05:44,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:05:44,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:44,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:05:44,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:05:44,714 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:05:44,815 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2024-11-28 05:05:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:05:44,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-28 05:05:44,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:05:44,819 INFO L225 Difference]: With dead ends: 48 [2024-11-28 05:05:44,819 INFO L226 Difference]: Without dead ends: 32 [2024-11-28 05:05:44,819 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:05:44,820 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:05:44,821 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:05:44,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-28 05:05:44,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2024-11-28 05:05:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:44,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-28 05:05:44,832 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2024-11-28 05:05:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:05:44,832 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-28 05:05:44,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:44,833 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-28 05:05:44,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 05:05:44,836 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:05:44,836 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 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 05:05:44,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:05:45,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:45,038 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:05:45,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:45,040 INFO L85 PathProgramCache]: Analyzing trace with hash 896310427, now seen corresponding path program 1 times [2024-11-28 05:05:45,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:45,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475413220] [2024-11-28 05:05:45,040 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:05:45,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:05:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:05:45,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:45,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475413220] [2024-11-28 05:05:45,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475413220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:45,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354342448] [2024-11-28 05:05:45,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:05:45,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:45,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:45,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:45,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:05:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:05:45,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 05:05:45,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:05:45,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:05:45,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354342448] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:45,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:45,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-28 05:05:45,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086656126] [2024-11-28 05:05:45,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:45,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:05:45,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:45,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:05:45,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:05:45,431 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:05:45,481 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2024-11-28 05:05:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:05:45,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-28 05:05:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:05:45,485 INFO L225 Difference]: With dead ends: 57 [2024-11-28 05:05:45,485 INFO L226 Difference]: Without dead ends: 34 [2024-11-28 05:05:45,486 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:05:45,486 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:05:45,487 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 122 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:05:45,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-28 05:05:45,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-28 05:05:45,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:45,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-11-28 05:05:45,495 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 26 [2024-11-28 05:05:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:05:45,497 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-11-28 05:05:45,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-11-28 05:05:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 05:05:45,498 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:05:45,498 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 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 05:05:45,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 05:05:45,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:45,699 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:05:45,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:45,699 INFO L85 PathProgramCache]: Analyzing trace with hash 132876903, now seen corresponding path program 2 times [2024-11-28 05:05:45,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:45,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206831326] [2024-11-28 05:05:45,700 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:05:45,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:45,782 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:05:45,785 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 05:05:45,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:45,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206831326] [2024-11-28 05:05:45,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206831326] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:45,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384946517] [2024-11-28 05:05:45,973 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:05:45,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:45,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:45,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:45,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:05:46,161 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:05:46,162 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:46,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:05:46,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:05:46,256 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:05:46,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384946517] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:46,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:46,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-11-28 05:05:46,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969943210] [2024-11-28 05:05:46,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:46,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 05:05:46,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:46,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 05:05:46,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:05:46,382 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:05:46,546 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2024-11-28 05:05:46,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:05:46,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-28 05:05:46,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:05:46,549 INFO L225 Difference]: With dead ends: 81 [2024-11-28 05:05:46,549 INFO L226 Difference]: Without dead ends: 58 [2024-11-28 05:05:46,549 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:05:46,550 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:05:46,550 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 100 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:05:46,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-28 05:05:46,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2024-11-28 05:05:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2024-11-28 05:05:46,563 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2024-11-28 05:05:46,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:05:46,563 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2024-11-28 05:05:46,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:46,563 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2024-11-28 05:05:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 05:05:46,564 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:05:46,566 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:46,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 05:05:46,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:46,767 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:05:46,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:46,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1872839025, now seen corresponding path program 3 times [2024-11-28 05:05:46,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:46,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306093365] [2024-11-28 05:05:46,768 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:05:46,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:46,862 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:05:46,862 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-28 05:05:47,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:47,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306093365] [2024-11-28 05:05:47,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306093365] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:47,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523698319] [2024-11-28 05:05:47,018 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:05:47,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:47,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:47,021 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:47,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:05:47,208 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:05:47,208 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:47,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 05:05:47,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-28 05:05:47,257 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-28 05:05:47,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523698319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:47,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:47,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-28 05:05:47,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842913403] [2024-11-28 05:05:47,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:47,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:05:47,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:47,313 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:05:47,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:05:47,316 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:05:47,497 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2024-11-28 05:05:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:05:47,497 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-28 05:05:47,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:05:47,498 INFO L225 Difference]: With dead ends: 111 [2024-11-28 05:05:47,498 INFO L226 Difference]: Without dead ends: 86 [2024-11-28 05:05:47,499 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:05:47,500 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:05:47,500 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 53 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:05:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-28 05:05:47,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-28 05:05:47,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 85 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:47,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2024-11-28 05:05:47,508 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 52 [2024-11-28 05:05:47,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:05:47,509 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2024-11-28 05:05:47,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:47,509 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2024-11-28 05:05:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-28 05:05:47,511 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:05:47,511 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:47,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 05:05:47,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:47,715 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:05:47,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:47,715 INFO L85 PathProgramCache]: Analyzing trace with hash 10300623, now seen corresponding path program 4 times [2024-11-28 05:05:47,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:47,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543840849] [2024-11-28 05:05:47,716 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:05:47,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:47,841 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:05:47,841 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2024-11-28 05:05:48,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:48,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543840849] [2024-11-28 05:05:48,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543840849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:48,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996791302] [2024-11-28 05:05:48,537 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:05:48,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:48,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:48,539 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:48,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:05:49,793 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:05:49,793 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:49,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:05:49,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2024-11-28 05:05:49,845 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2024-11-28 05:05:50,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996791302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:50,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:50,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-11-28 05:05:50,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230576989] [2024-11-28 05:05:50,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:50,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:05:50,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:50,013 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:05:50,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:05:50,014 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:50,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:05:50,412 INFO L93 Difference]: Finished difference Result 199 states and 239 transitions. [2024-11-28 05:05:50,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:05:50,413 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2024-11-28 05:05:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:05:50,414 INFO L225 Difference]: With dead ends: 199 [2024-11-28 05:05:50,414 INFO L226 Difference]: Without dead ends: 150 [2024-11-28 05:05:50,415 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:05:50,416 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:05:50,416 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 69 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:05:50,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-28 05:05:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-11-28 05:05:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0402684563758389) internal successors, (155), 149 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2024-11-28 05:05:50,432 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 84 [2024-11-28 05:05:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:05:50,432 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2024-11-28 05:05:50,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:50,433 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2024-11-28 05:05:50,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-28 05:05:50,437 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:05:50,437 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:50,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 05:05:50,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 05:05:50,638 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:05:50,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:50,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1137374897, now seen corresponding path program 5 times [2024-11-28 05:05:50,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:50,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376133961] [2024-11-28 05:05:50,639 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:05:50,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:50,947 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-28 05:05:50,948 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2024-11-28 05:05:51,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:51,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376133961] [2024-11-28 05:05:51,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376133961] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:51,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755261607] [2024-11-28 05:05:51,750 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:05:51,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:51,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:51,752 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:51,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca29bc35-abb8-40d9-a701-8b7bb997e2e1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process