./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_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_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/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_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/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_822f6cc1-3e07-4ce7-8403-89faa0f43044/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 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:50:21,424 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:50:21,525 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 19:50:21,534 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:50:21,534 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:50:21,574 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:50:21,575 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:50:21,575 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:50:21,575 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:50:21,576 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:50:21,576 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:50:21,576 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:50:21,576 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:50:21,577 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:50:21,578 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:50:21,578 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:50:21,578 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:50:21,578 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:50:21,578 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:50:21,578 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:50:21,578 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:50:21,578 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:50:21,579 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:50:21,579 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:50:21,579 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:50:21,579 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:50:21,579 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:50:21,579 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:50:21,579 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:50:21,579 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:50:21,579 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:50:21,579 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:50:21,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:50:21,580 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:50:21,580 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:50:21,580 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:50:21,580 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:50:21,580 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:50:21,580 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:50:21,580 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:50:21,580 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:50:21,580 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:50:21,581 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 19:50:21,581 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 19:50:21,581 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:50:21,581 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:50:21,581 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:50:21,581 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:50:21,581 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_822f6cc1-3e07-4ce7-8403-89faa0f43044/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 -> 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 [2024-11-27 19:50:21,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:50:21,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:50:21,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:50:21,948 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:50:21,949 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:50:21,951 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2024-11-27 19:50:24,964 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/data/47d138a3e/243b78b07e324c18af9571a1ab2b158f/FLAG06fb4d5d2 [2024-11-27 19:50:25,247 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:50:25,248 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2024-11-27 19:50:25,259 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/data/47d138a3e/243b78b07e324c18af9571a1ab2b158f/FLAG06fb4d5d2 [2024-11-27 19:50:25,539 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/data/47d138a3e/243b78b07e324c18af9571a1ab2b158f [2024-11-27 19:50:25,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:50:25,545 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:50:25,547 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:50:25,547 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:50:25,556 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:50:25,557 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:50:25" (1/1) ... [2024-11-27 19:50:25,560 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ca2e931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:25, skipping insertion in model container [2024-11-27 19:50:25,560 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:50:25" (1/1) ... [2024-11-27 19:50:25,578 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:50:25,744 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_822f6cc1-3e07-4ce7-8403-89faa0f43044/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2024-11-27 19:50:25,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:50:25,783 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:50:25,793 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_822f6cc1-3e07-4ce7-8403-89faa0f43044/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2024-11-27 19:50:25,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:50:25,819 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:50:25,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:25 WrapperNode [2024-11-27 19:50:25,820 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:50:25,821 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:50:25,821 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:50:25,821 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:50:25,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:25" (1/1) ... [2024-11-27 19:50:25,841 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:25" (1/1) ... [2024-11-27 19:50:25,863 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 130 [2024-11-27 19:50:25,863 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:50:25,866 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:50:25,866 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:50:25,866 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:50:25,875 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:25" (1/1) ... [2024-11-27 19:50:25,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:25" (1/1) ... [2024-11-27 19:50:25,878 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:25" (1/1) ... [2024-11-27 19:50:25,896 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 7, 3]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 2, 1]. [2024-11-27 19:50:25,896 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:25" (1/1) ... [2024-11-27 19:50:25,896 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:25" (1/1) ... [2024-11-27 19:50:25,903 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:25" (1/1) ... [2024-11-27 19:50:25,904 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:25" (1/1) ... [2024-11-27 19:50:25,909 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:25" (1/1) ... [2024-11-27 19:50:25,911 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:25" (1/1) ... [2024-11-27 19:50:25,912 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:25" (1/1) ... [2024-11-27 19:50:25,914 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:50:25,915 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:50:25,916 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:50:25,916 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:50:25,917 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:25" (1/1) ... [2024-11-27 19:50:25,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:50:25,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:25,954 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:50:25,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:50:25,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:50:25,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 19:50:25,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 19:50:25,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 19:50:25,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 19:50:25,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 19:50:25,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 19:50:25,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-27 19:50:25,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:50:25,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:50:25,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 19:50:25,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 19:50:25,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-27 19:50:25,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 19:50:25,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 19:50:25,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 19:50:26,115 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:50:26,117 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:50:26,376 INFO L? ?]: Removed 32 outVars from TransFormulas that were not future-live. [2024-11-27 19:50:26,376 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:50:26,392 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:50:26,392 INFO L312 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-27 19:50:26,393 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:50:26 BoogieIcfgContainer [2024-11-27 19:50:26,393 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:50:26,399 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:50:26,399 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:50:26,405 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:50:26,406 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:50:25" (1/3) ... [2024-11-27 19:50:26,406 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e45d830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:50:26, skipping insertion in model container [2024-11-27 19:50:26,407 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:25" (2/3) ... [2024-11-27 19:50:26,407 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e45d830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:50:26, skipping insertion in model container [2024-11-27 19:50:26,407 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:50:26" (3/3) ... [2024-11-27 19:50:26,409 INFO L128 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-2.i [2024-11-27 19:50:26,425 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:50:26,427 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG data_structures_set_multi_proc_ground-2.i that has 2 procedures, 44 locations, 1 initial locations, 8 loop locations, and 1 error locations. [2024-11-27 19:50:26,495 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:50:26,510 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;@22a80bea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:50:26,510 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 19:50:26,515 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 40 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:50:26,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-27 19:50:26,523 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:50:26,523 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:26,524 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:50:26,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:26,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1829362696, now seen corresponding path program 1 times [2024-11-27 19:50:26,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:26,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444370144] [2024-11-27 19:50:26,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:26,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:26,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:26,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444370144] [2024-11-27 19:50:26,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444370144] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:50:26,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:50:26,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:50:26,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111199455] [2024-11-27 19:50:26,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:50:26,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:50:26,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:26,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:50:26,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:50:26,867 INFO L87 Difference]: Start difference. First operand has 44 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 40 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:50:26,996 INFO L93 Difference]: Finished difference Result 100 states and 152 transitions. [2024-11-27 19:50:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:50:27,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-27 19:50:27,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:50:27,009 INFO L225 Difference]: With dead ends: 100 [2024-11-27 19:50:27,009 INFO L226 Difference]: Without dead ends: 56 [2024-11-27 19:50:27,013 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 [2024-11-27 19:50:27,018 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 13 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:50:27,019 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 81 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:50:27,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-27 19:50:27,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2024-11-27 19:50:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:50:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2024-11-27 19:50:27,071 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 12 [2024-11-27 19:50:27,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:50:27,072 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2024-11-27 19:50:27,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:27,073 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2024-11-27 19:50:27,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-27 19:50:27,076 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:50:27,077 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:27,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 19:50:27,077 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:50:27,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:27,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1008438452, now seen corresponding path program 1 times [2024-11-27 19:50:27,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:27,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486987381] [2024-11-27 19:50:27,081 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:27,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:27,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:27,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486987381] [2024-11-27 19:50:27,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486987381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:27,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668498167] [2024-11-27 19:50:27,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:27,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:27,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:27,255 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:27,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:50:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:27,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 19:50:27,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:27,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:50:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:27,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668498167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:50:27,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:50:27,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-27 19:50:27,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749816191] [2024-11-27 19:50:27,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:50:27,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:50:27,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:27,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:50:27,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:50:27,431 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:27,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:50:27,675 INFO L93 Difference]: Finished difference Result 139 states and 181 transitions. [2024-11-27 19:50:27,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:50:27,677 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-27 19:50:27,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:50:27,680 INFO L225 Difference]: With dead ends: 139 [2024-11-27 19:50:27,681 INFO L226 Difference]: Without dead ends: 103 [2024-11-27 19:50:27,681 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:50:27,682 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 108 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:50:27,682 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 100 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:50:27,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-27 19:50:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 47. [2024-11-27 19:50:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:50:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2024-11-27 19:50:27,699 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 14 [2024-11-27 19:50:27,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:50:27,699 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2024-11-27 19:50:27,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:27,700 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2024-11-27 19:50:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-27 19:50:27,701 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:50:27,701 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:27,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 19:50:27,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:27,902 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:50:27,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:27,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1587498216, now seen corresponding path program 2 times [2024-11-27 19:50:27,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:27,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405568390] [2024-11-27 19:50:27,903 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:50:27,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:27,961 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 19:50:27,962 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 19:50:28,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:28,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405568390] [2024-11-27 19:50:28,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405568390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:50:28,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:50:28,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:50:28,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015536870] [2024-11-27 19:50:28,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:50:28,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:50:28,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:28,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:50:28,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:50:28,089 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:50:28,168 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2024-11-27 19:50:28,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:50:28,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-27 19:50:28,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:50:28,171 INFO L225 Difference]: With dead ends: 87 [2024-11-27 19:50:28,172 INFO L226 Difference]: Without dead ends: 50 [2024-11-27 19:50:28,172 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:50:28,173 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:50:28,173 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 85 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:50:28,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-27 19:50:28,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-27 19:50:28,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 19:50:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-11-27 19:50:28,186 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 20 [2024-11-27 19:50:28,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:50:28,186 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-11-27 19:50:28,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:28,187 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-11-27 19:50:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-27 19:50:28,189 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:50:28,190 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, 1, 1] [2024-11-27 19:50:28,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 19:50:28,190 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:50:28,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:28,191 INFO L85 PathProgramCache]: Analyzing trace with hash 954315980, now seen corresponding path program 1 times [2024-11-27 19:50:28,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:28,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456434959] [2024-11-27 19:50:28,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:28,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 19:50:28,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:28,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456434959] [2024-11-27 19:50:28,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456434959] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:50:28,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:50:28,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:50:28,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561674128] [2024-11-27 19:50:28,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:50:28,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:50:28,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:28,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:50:28,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:50:28,363 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:28,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:50:28,408 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2024-11-27 19:50:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:50:28,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-27 19:50:28,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:50:28,411 INFO L225 Difference]: With dead ends: 97 [2024-11-27 19:50:28,411 INFO L226 Difference]: Without dead ends: 63 [2024-11-27 19:50:28,412 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 [2024-11-27 19:50:28,414 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:50:28,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:50:28,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-27 19:50:28,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2024-11-27 19:50:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 19:50:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-11-27 19:50:28,430 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 34 [2024-11-27 19:50:28,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:50:28,430 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-11-27 19:50:28,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:28,431 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-11-27 19:50:28,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-27 19:50:28,431 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:50:28,432 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, 1, 1, 1, 1] [2024-11-27 19:50:28,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 19:50:28,432 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:50:28,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:28,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1237410192, now seen corresponding path program 1 times [2024-11-27 19:50:28,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:28,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123946460] [2024-11-27 19:50:28,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:28,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 19:50:28,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:28,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123946460] [2024-11-27 19:50:28,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123946460] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:28,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262812515] [2024-11-27 19:50:28,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:28,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:28,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:28,559 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:28,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:50:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:28,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 19:50:28,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:50:28,751 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:50:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:50:28,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262812515] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:50:28,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:50:28,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-11-27 19:50:28,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706812617] [2024-11-27 19:50:28,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:50:28,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 19:50:28,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:28,878 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 19:50:28,878 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-27 19:50:28,878 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:50:29,174 INFO L93 Difference]: Finished difference Result 206 states and 262 transitions. [2024-11-27 19:50:29,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 19:50:29,179 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-27 19:50:29,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:50:29,182 INFO L225 Difference]: With dead ends: 206 [2024-11-27 19:50:29,185 INFO L226 Difference]: Without dead ends: 166 [2024-11-27 19:50:29,186 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-27 19:50:29,187 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 148 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:50:29,187 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 169 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:50:29,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-27 19:50:29,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 76. [2024-11-27 19:50:29,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 73 states have internal predecessors, (87), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 19:50:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2024-11-27 19:50:29,213 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 36 [2024-11-27 19:50:29,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:50:29,214 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2024-11-27 19:50:29,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2024-11-27 19:50:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-27 19:50:29,217 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:50:29,217 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, 1, 1, 1, 1, 1] [2024-11-27 19:50:29,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 19:50:29,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:29,418 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:50:29,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:29,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1273428208, now seen corresponding path program 1 times [2024-11-27 19:50:29,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:29,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315505464] [2024-11-27 19:50:29,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:29,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-11-27 19:50:29,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:29,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315505464] [2024-11-27 19:50:29,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315505464] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:50:29,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:50:29,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:50:29,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131443025] [2024-11-27 19:50:29,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:50:29,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:50:29,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:29,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:50:29,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:50:29,660 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:29,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:50:29,684 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2024-11-27 19:50:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:50:29,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-27 19:50:29,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:50:29,687 INFO L225 Difference]: With dead ends: 115 [2024-11-27 19:50:29,687 INFO L226 Difference]: Without dead ends: 82 [2024-11-27 19:50:29,687 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:50:29,688 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:50:29,688 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:50:29,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-27 19:50:29,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2024-11-27 19:50:29,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 76 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 19:50:29,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2024-11-27 19:50:29,708 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 57 [2024-11-27 19:50:29,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:50:29,709 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2024-11-27 19:50:29,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:29,710 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2024-11-27 19:50:29,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-27 19:50:29,711 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:50:29,711 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:29,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 19:50:29,712 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:50:29,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:29,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1975715806, now seen corresponding path program 1 times [2024-11-27 19:50:29,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:29,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94032973] [2024-11-27 19:50:29,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:29,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-27 19:50:30,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:30,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94032973] [2024-11-27 19:50:30,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94032973] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:50:30,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:50:30,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:50:30,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642742610] [2024-11-27 19:50:30,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:50:30,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:50:30,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:30,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:50:30,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:50:30,023 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:30,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:50:30,065 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2024-11-27 19:50:30,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:50:30,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-27 19:50:30,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:50:30,066 INFO L225 Difference]: With dead ends: 112 [2024-11-27 19:50:30,067 INFO L226 Difference]: Without dead ends: 67 [2024-11-27 19:50:30,067 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:50:30,068 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:50:30,068 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 94 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:50:30,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-27 19:50:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-27 19:50:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 19:50:30,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2024-11-27 19:50:30,082 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 58 [2024-11-27 19:50:30,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:50:30,082 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2024-11-27 19:50:30,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:30,082 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2024-11-27 19:50:30,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-27 19:50:30,083 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:50:30,084 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:30,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 19:50:30,084 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:50:30,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:30,088 INFO L85 PathProgramCache]: Analyzing trace with hash -582286370, now seen corresponding path program 2 times [2024-11-27 19:50:30,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:30,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637065818] [2024-11-27 19:50:30,089 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:50:30,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:30,148 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:50:30,148 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 19:50:30,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:30,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637065818] [2024-11-27 19:50:30,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637065818] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:30,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578082821] [2024-11-27 19:50:30,506 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:50:30,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:30,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:30,508 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:30,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:50:30,645 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:50:30,645 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:30,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 19:50:30,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 19:50:30,708 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:50:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 19:50:31,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578082821] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:50:31,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:50:31,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-27 19:50:31,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960917080] [2024-11-27 19:50:31,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:50:31,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-27 19:50:31,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:31,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-27 19:50:31,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-27 19:50:31,037 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:31,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:50:31,436 INFO L93 Difference]: Finished difference Result 289 states and 358 transitions. [2024-11-27 19:50:31,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-27 19:50:31,436 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-27 19:50:31,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:50:31,438 INFO L225 Difference]: With dead ends: 289 [2024-11-27 19:50:31,438 INFO L226 Difference]: Without dead ends: 245 [2024-11-27 19:50:31,439 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-27 19:50:31,439 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 359 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:50:31,439 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 222 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 19:50:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-27 19:50:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 91. [2024-11-27 19:50:31,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 88 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 19:50:31,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2024-11-27 19:50:31,489 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 58 [2024-11-27 19:50:31,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:50:31,489 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2024-11-27 19:50:31,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:31,490 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2024-11-27 19:50:31,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-27 19:50:31,491 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:50:31,491 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:31,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 19:50:31,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-27 19:50:31,691 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:50:31,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:31,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2088355086, now seen corresponding path program 3 times [2024-11-27 19:50:31,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:31,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667931573] [2024-11-27 19:50:31,692 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:50:31,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:31,737 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 19:50:31,737 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-11-27 19:50:31,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:31,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667931573] [2024-11-27 19:50:31,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667931573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:31,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553497633] [2024-11-27 19:50:31,807 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:50:31,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:31,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:31,809 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:31,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:50:31,954 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 19:50:31,954 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:31,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 19:50:31,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-11-27 19:50:31,985 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:50:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-11-27 19:50:32,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553497633] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:50:32,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:50:32,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-27 19:50:32,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97830712] [2024-11-27 19:50:32,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:50:32,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 19:50:32,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:32,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 19:50:32,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-27 19:50:32,030 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:32,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:50:32,120 INFO L93 Difference]: Finished difference Result 183 states and 215 transitions. [2024-11-27 19:50:32,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 19:50:32,121 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2024-11-27 19:50:32,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:50:32,123 INFO L225 Difference]: With dead ends: 183 [2024-11-27 19:50:32,123 INFO L226 Difference]: Without dead ends: 147 [2024-11-27 19:50:32,123 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-27 19:50:32,124 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 136 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:50:32,124 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 122 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:50:32,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-27 19:50:32,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-11-27 19:50:32,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 144 states have (on average 1.1388888888888888) internal successors, (164), 144 states have internal predecessors, (164), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 19:50:32,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 166 transitions. [2024-11-27 19:50:32,140 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 166 transitions. Word has length 82 [2024-11-27 19:50:32,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:50:32,141 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 166 transitions. [2024-11-27 19:50:32,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 166 transitions. [2024-11-27 19:50:32,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-27 19:50:32,142 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:50:32,142 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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 19:50:32,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 19:50:32,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-27 19:50:32,347 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:50:32,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:32,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1308835302, now seen corresponding path program 4 times [2024-11-27 19:50:32,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:32,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564446914] [2024-11-27 19:50:32,347 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:50:32,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:32,412 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:50:32,412 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2024-11-27 19:50:32,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:32,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564446914] [2024-11-27 19:50:32,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564446914] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:32,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175533480] [2024-11-27 19:50:32,749 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:50:32,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:32,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:32,751 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:32,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 19:50:32,966 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:50:32,966 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:32,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 19:50:32,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2024-11-27 19:50:33,181 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:50:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2024-11-27 19:50:33,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175533480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:50:33,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:50:33,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-11-27 19:50:33,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069837433] [2024-11-27 19:50:33,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:50:33,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 19:50:33,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:33,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 19:50:33,415 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2024-11-27 19:50:33,416 INFO L87 Difference]: Start difference. First operand 147 states and 166 transitions. Second operand has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:33,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:50:33,640 INFO L93 Difference]: Finished difference Result 343 states and 419 transitions. [2024-11-27 19:50:33,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 19:50:33,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2024-11-27 19:50:33,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:50:33,643 INFO L225 Difference]: With dead ends: 343 [2024-11-27 19:50:33,643 INFO L226 Difference]: Without dead ends: 259 [2024-11-27 19:50:33,644 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2024-11-27 19:50:33,648 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 174 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:50:33,648 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 215 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:50:33,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-27 19:50:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2024-11-27 19:50:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 256 states have (on average 1.171875) internal successors, (300), 256 states have internal predecessors, (300), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 19:50:33,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 302 transitions. [2024-11-27 19:50:33,679 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 302 transitions. Word has length 122 [2024-11-27 19:50:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:50:33,680 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 302 transitions. [2024-11-27 19:50:33,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 302 transitions. [2024-11-27 19:50:33,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2024-11-27 19:50:33,684 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:50:33,684 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 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 19:50:33,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 19:50:33,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 19:50:33,885 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:50:33,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:33,886 INFO L85 PathProgramCache]: Analyzing trace with hash -760275050, now seen corresponding path program 5 times [2024-11-27 19:50:33,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:33,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104129038] [2024-11-27 19:50:33,886 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:50:33,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:34,322 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2024-11-27 19:50:34,322 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2024-11-27 19:50:35,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:35,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104129038] [2024-11-27 19:50:35,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104129038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:35,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819945508] [2024-11-27 19:50:35,745 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:50:35,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:35,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:35,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:35,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 19:52:54,450 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2024-11-27 19:52:54,450 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:54,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-27 19:52:54,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2024-11-27 19:52:54,621 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:52:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2024-11-27 19:52:55,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819945508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:52:55,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:52:55,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2024-11-27 19:52:55,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111896129] [2024-11-27 19:52:55,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:52:55,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-27 19:52:55,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:52:55,880 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-27 19:52:55,881 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-11-27 19:52:55,881 INFO L87 Difference]: Start difference. First operand 259 states and 302 transitions. Second operand has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 48 states have internal predecessors, (121), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:57,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:52:57,139 INFO L93 Difference]: Finished difference Result 841 states and 1042 transitions. [2024-11-27 19:52:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-27 19:52:57,140 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 48 states have internal predecessors, (121), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2024-11-27 19:52:57,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:52:57,146 INFO L225 Difference]: With dead ends: 841 [2024-11-27 19:52:57,147 INFO L226 Difference]: Without dead ends: 629 [2024-11-27 19:52:57,149 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-11-27 19:52:57,150 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 720 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 19:52:57,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 365 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 19:52:57,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2024-11-27 19:52:57,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 307. [2024-11-27 19:52:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 304 states have (on average 1.144736842105263) internal successors, (348), 304 states have internal predecessors, (348), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 19:52:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 350 transitions. [2024-11-27 19:52:57,199 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 350 transitions. Word has length 202 [2024-11-27 19:52:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:52:57,199 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 350 transitions. [2024-11-27 19:52:57,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 48 states have internal predecessors, (121), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 350 transitions. [2024-11-27 19:52:57,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2024-11-27 19:52:57,202 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:52:57,203 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 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 19:52:57,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 19:52:57,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-27 19:52:57,403 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:52:57,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:57,404 INFO L85 PathProgramCache]: Analyzing trace with hash 808538614, now seen corresponding path program 6 times [2024-11-27 19:52:57,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:52:57,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42358590] [2024-11-27 19:52:57,404 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:52:57,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:52:57,555 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-27 19:52:57,556 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3028 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2962 trivial. 0 not checked. [2024-11-27 19:52:57,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:52:57,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42358590] [2024-11-27 19:52:57,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42358590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:52:57,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730744269] [2024-11-27 19:52:57,822 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:52:57,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:57,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:57,825 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:57,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 19:52:58,464 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-27 19:52:58,465 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:58,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 19:52:58,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3028 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2962 trivial. 0 not checked. [2024-11-27 19:52:58,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:52:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3028 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2962 trivial. 0 not checked. [2024-11-27 19:52:59,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730744269] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:52:59,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:52:59,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-27 19:52:59,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851180170] [2024-11-27 19:52:59,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:52:59,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 19:52:59,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:52:59,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 19:52:59,428 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-27 19:52:59,428 INFO L87 Difference]: Start difference. First operand 307 states and 350 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:52:59,592 INFO L93 Difference]: Finished difference Result 460 states and 542 transitions. [2024-11-27 19:52:59,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 19:52:59,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2024-11-27 19:52:59,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:52:59,596 INFO L225 Difference]: With dead ends: 460 [2024-11-27 19:52:59,596 INFO L226 Difference]: Without dead ends: 441 [2024-11-27 19:52:59,598 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 494 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-11-27 19:52:59,599 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:52:59,600 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 257 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:52:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2024-11-27 19:52:59,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 403. [2024-11-27 19:52:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 400 states have (on average 1.2) internal successors, (480), 400 states have internal predecessors, (480), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 19:52:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 482 transitions. [2024-11-27 19:52:59,634 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 482 transitions. Word has length 250 [2024-11-27 19:52:59,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:52:59,635 INFO L471 AbstractCegarLoop]: Abstraction has 403 states and 482 transitions. [2024-11-27 19:52:59,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 482 transitions. [2024-11-27 19:52:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2024-11-27 19:52:59,639 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:52:59,639 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:59,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 19:52:59,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:59,840 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:52:59,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:59,841 INFO L85 PathProgramCache]: Analyzing trace with hash -417341510, now seen corresponding path program 7 times [2024-11-27 19:52:59,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:52:59,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736111233] [2024-11-27 19:52:59,841 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:52:59,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:53:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:53:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3006 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked. [2024-11-27 19:53:03,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:53:03,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736111233] [2024-11-27 19:53:03,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736111233] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:53:03,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847885632] [2024-11-27 19:53:03,684 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:53:03,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:03,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:53:03,687 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:53:03,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 19:53:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:53:04,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-27 19:53:04,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:53:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3006 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked. [2024-11-27 19:53:04,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:53:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3006 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked. [2024-11-27 19:53:08,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847885632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:53:08,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:53:08,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-11-27 19:53:08,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354011271] [2024-11-27 19:53:08,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:53:08,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-27 19:53:08,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:53:08,592 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-27 19:53:08,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-11-27 19:53:08,599 INFO L87 Difference]: Start difference. First operand 403 states and 482 transitions. Second operand has 97 states, 97 states have (on average 2.268041237113402) internal successors, (220), 97 states have internal predecessors, (220), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:53:12,909 INFO L93 Difference]: Finished difference Result 1465 states and 1858 transitions. [2024-11-27 19:53:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-27 19:53:12,910 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.268041237113402) internal successors, (220), 97 states have internal predecessors, (220), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2024-11-27 19:53:12,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:53:12,917 INFO L225 Difference]: With dead ends: 1465 [2024-11-27 19:53:12,917 INFO L226 Difference]: Without dead ends: 1157 [2024-11-27 19:53:12,920 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-11-27 19:53:12,921 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 2070 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2164 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:53:12,921 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2164 Valid, 522 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-27 19:53:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2024-11-27 19:53:12,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 499. [2024-11-27 19:53:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 496 states have (on average 1.1612903225806452) internal successors, (576), 496 states have internal predecessors, (576), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 19:53:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 578 transitions. [2024-11-27 19:53:12,978 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 578 transitions. Word has length 250 [2024-11-27 19:53:12,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:53:12,979 INFO L471 AbstractCegarLoop]: Abstraction has 499 states and 578 transitions. [2024-11-27 19:53:12,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.268041237113402) internal successors, (220), 97 states have internal predecessors, (220), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:12,980 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 578 transitions. [2024-11-27 19:53:12,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2024-11-27 19:53:12,985 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:53:12,986 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:53:13,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 19:53:13,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 19:53:13,187 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:53:13,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:53:13,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1632795526, now seen corresponding path program 8 times [2024-11-27 19:53:13,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:53:13,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682881737] [2024-11-27 19:53:13,188 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:53:13,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:53:13,404 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:53:13,404 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9726 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked. [2024-11-27 19:53:23,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:53:23,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682881737] [2024-11-27 19:53:23,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682881737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:53:23,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196280923] [2024-11-27 19:53:23,379 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:53:23,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:23,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:53:23,382 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:53:23,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 19:53:23,904 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:53:23,904 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:23,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-27 19:53:23,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:53:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9726 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked. [2024-11-27 19:53:24,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:53:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9726 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked. [2024-11-27 19:53:37,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196280923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:53:37,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:53:37,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2024-11-27 19:53:37,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185351166] [2024-11-27 19:53:37,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:53:37,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-11-27 19:53:37,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:53:37,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-11-27 19:53:37,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2024-11-27 19:53:37,783 INFO L87 Difference]: Start difference. First operand 499 states and 578 transitions. Second operand has 193 states, 193 states have (on average 2.134715025906736) internal successors, (412), 193 states have internal predecessors, (412), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:15,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:15,332 INFO L93 Difference]: Finished difference Result 2329 states and 2962 transitions. [2024-11-27 19:54:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-11-27 19:54:15,333 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.134715025906736) internal successors, (412), 193 states have internal predecessors, (412), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 346 [2024-11-27 19:54:15,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:15,345 INFO L225 Difference]: With dead ends: 2329 [2024-11-27 19:54:15,345 INFO L226 Difference]: Without dead ends: 2021 [2024-11-27 19:54:15,351 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 596 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2024-11-27 19:54:15,352 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4534 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 962 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4724 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 2433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 962 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:15,352 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4724 Valid, 885 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [962 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-27 19:54:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2024-11-27 19:54:15,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 691. [2024-11-27 19:54:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 688 states have (on average 1.1162790697674418) internal successors, (768), 688 states have internal predecessors, (768), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 19:54:15,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 770 transitions. [2024-11-27 19:54:15,473 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 770 transitions. Word has length 346 [2024-11-27 19:54:15,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:15,473 INFO L471 AbstractCegarLoop]: Abstraction has 691 states and 770 transitions. [2024-11-27 19:54:15,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.134715025906736) internal successors, (412), 193 states have internal predecessors, (412), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:15,474 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 770 transitions. [2024-11-27 19:54:15,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2024-11-27 19:54:15,487 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:15,488 INFO L218 NwaCegarLoop]: trace histogram [190, 190, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:54:15,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 19:54:15,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 19:54:15,692 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:15,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:15,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1712468486, now seen corresponding path program 9 times [2024-11-27 19:54:15,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:15,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051257318] [2024-11-27 19:54:15,693 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:54:15,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:15,844 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:54:15,844 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36990 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 36922 trivial. 0 not checked. [2024-11-27 19:54:16,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:16,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051257318] [2024-11-27 19:54:16,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051257318] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:54:16,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:54:16,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-27 19:54:16,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954072257] [2024-11-27 19:54:16,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:54:16,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 19:54:16,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:16,061 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 19:54:16,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 19:54:16,061 INFO L87 Difference]: Start difference. First operand 691 states and 770 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:16,260 INFO L93 Difference]: Finished difference Result 1050 states and 1244 transitions. [2024-11-27 19:54:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 19:54:16,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 538 [2024-11-27 19:54:16,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:16,267 INFO L225 Difference]: With dead ends: 1050 [2024-11-27 19:54:16,267 INFO L226 Difference]: Without dead ends: 1037 [2024-11-27 19:54:16,268 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-27 19:54:16,269 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 58 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:16,269 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 170 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:54:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2024-11-27 19:54:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 882. [2024-11-27 19:54:16,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 879 states have (on average 1.1751990898748579) internal successors, (1033), 879 states have internal predecessors, (1033), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 19:54:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1035 transitions. [2024-11-27 19:54:16,319 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1035 transitions. Word has length 538 [2024-11-27 19:54:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:16,321 INFO L471 AbstractCegarLoop]: Abstraction has 882 states and 1035 transitions. [2024-11-27 19:54:16,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1035 transitions. [2024-11-27 19:54:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2024-11-27 19:54:16,334 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:16,334 INFO L218 NwaCegarLoop]: trace histogram [190, 190, 14, 14, 14, 14, 14, 14, 13, 13, 13, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:54:16,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-27 19:54:16,335 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:16,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:16,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2021009776, now seen corresponding path program 10 times [2024-11-27 19:54:16,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:16,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986988407] [2024-11-27 19:54:16,336 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:54:16,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:16,598 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:54:16,598 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 37013 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 36959 trivial. 0 not checked. [2024-11-27 19:54:17,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:17,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986988407] [2024-11-27 19:54:17,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986988407] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:54:17,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:54:17,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:54:17,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587019450] [2024-11-27 19:54:17,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:54:17,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:54:17,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:17,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:54:17,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:54:17,346 INFO L87 Difference]: Start difference. First operand 882 states and 1035 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:17,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:17,388 INFO L93 Difference]: Finished difference Result 1208 states and 1456 transitions. [2024-11-27 19:54:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:54:17,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 539 [2024-11-27 19:54:17,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:17,394 INFO L225 Difference]: With dead ends: 1208 [2024-11-27 19:54:17,395 INFO L226 Difference]: Without dead ends: 882 [2024-11-27 19:54:17,396 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:54:17,396 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:17,397 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:54:17,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2024-11-27 19:54:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 880. [2024-11-27 19:54:17,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 877 states have (on average 1.1334093500570126) internal successors, (994), 877 states have internal predecessors, (994), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 19:54:17,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 996 transitions. [2024-11-27 19:54:17,441 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 996 transitions. Word has length 539 [2024-11-27 19:54:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:17,443 INFO L471 AbstractCegarLoop]: Abstraction has 880 states and 996 transitions. [2024-11-27 19:54:17,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:17,443 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 996 transitions. [2024-11-27 19:54:17,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2024-11-27 19:54:17,448 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:17,448 INFO L218 NwaCegarLoop]: trace histogram [190, 190, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:54:17,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-27 19:54:17,449 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:17,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:17,449 INFO L85 PathProgramCache]: Analyzing trace with hash -2024072419, now seen corresponding path program 1 times [2024-11-27 19:54:17,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:17,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509939593] [2024-11-27 19:54:17,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:17,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 37028 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2024-11-27 19:54:51,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:51,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509939593] [2024-11-27 19:54:51,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509939593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:51,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135113506] [2024-11-27 19:54:51,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:51,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:51,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:51,726 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:51,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_822f6cc1-3e07-4ce7-8403-89faa0f43044/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 19:54:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:52,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 2456 conjuncts, 192 conjuncts are in the unsatisfiable core [2024-11-27 19:54:52,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 37028 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2024-11-27 19:54:53,653 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:55:51,795 INFO L134 CoverageAnalysis]: Checked inductivity of 37028 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2024-11-27 19:55:51,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135113506] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:55:51,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:55:51,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2024-11-27 19:55:51,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708183799] [2024-11-27 19:55:51,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:55:51,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2024-11-27 19:55:51,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:55:51,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2024-11-27 19:55:51,847 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2024-11-27 19:55:51,848 INFO L87 Difference]: Start difference. First operand 880 states and 996 transitions. Second operand has 385 states, 385 states have (on average 2.07012987012987) internal successors, (797), 385 states have internal predecessors, (797), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)