./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.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_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/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_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/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_0763d59e-ef5e-4527-8e38-b0fc463e6554/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 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:41:46,453 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:41:46,545 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 02:41:46,551 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:41:46,551 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:41:46,600 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:41:46,601 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:41:46,602 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:41:46,602 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:41:46,603 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:41:46,604 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:41:46,604 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:41:46,605 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:41:46,605 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:41:46,605 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:41:46,605 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:41:46,606 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 02:41:46,606 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:41:46,606 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:41:46,606 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:41:46,606 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:41:46,607 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 02:41:46,607 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:41:46,607 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 02:41:46,607 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:41:46,607 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 02:41:46,608 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:41:46,608 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:41:46,608 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:41:46,608 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:41:46,608 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:41:46,608 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:41:46,608 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:41:46,609 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:41:46,609 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:41:46,610 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:41:46,610 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:41:46,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:41:46,610 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:41:46,610 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:41:46,610 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 02:41:46,610 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 02:41:46,610 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:41:46,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:41:46,610 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:41:46,610 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:41:46,611 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:41:46,611 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:41:46,611 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_0763d59e-ef5e-4527-8e38-b0fc463e6554/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 -> 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 [2024-11-28 02:41:46,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:41:47,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:41:47,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:41:47,010 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:41:47,011 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:41:47,012 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2024-11-28 02:41:50,167 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/data/7956fd0f6/a062c658e1bc4b2c882edd75039c5efa/FLAG75288797d [2024-11-28 02:41:50,434 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:41:50,435 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2024-11-28 02:41:50,444 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/data/7956fd0f6/a062c658e1bc4b2c882edd75039c5efa/FLAG75288797d [2024-11-28 02:41:50,475 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/data/7956fd0f6/a062c658e1bc4b2c882edd75039c5efa [2024-11-28 02:41:50,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:41:50,481 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:41:50,483 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:41:50,484 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:41:50,493 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:41:50,495 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:41:50" (1/1) ... [2024-11-28 02:41:50,496 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774e2701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:50, skipping insertion in model container [2024-11-28 02:41:50,496 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:41:50" (1/1) ... [2024-11-28 02:41:50,517 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:41:50,717 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_0763d59e-ef5e-4527-8e38-b0fc463e6554/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2024-11-28 02:41:50,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:41:50,772 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:41:50,785 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_0763d59e-ef5e-4527-8e38-b0fc463e6554/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2024-11-28 02:41:50,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:41:50,833 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:41:50,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:50 WrapperNode [2024-11-28 02:41:50,836 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:41:50,837 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:41:50,837 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:41:50,837 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:41:50,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:50" (1/1) ... [2024-11-28 02:41:50,854 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:50" (1/1) ... [2024-11-28 02:41:50,877 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 130 [2024-11-28 02:41:50,878 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:41:50,878 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:41:50,879 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:41:50,879 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:41:50,889 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:50" (1/1) ... [2024-11-28 02:41:50,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:50" (1/1) ... [2024-11-28 02:41:50,892 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:50" (1/1) ... [2024-11-28 02:41:50,913 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]. [2024-11-28 02:41:50,913 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:50" (1/1) ... [2024-11-28 02:41:50,914 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:50" (1/1) ... [2024-11-28 02:41:50,925 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:50" (1/1) ... [2024-11-28 02:41:50,926 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:50" (1/1) ... [2024-11-28 02:41:50,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:50" (1/1) ... [2024-11-28 02:41:50,932 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:50" (1/1) ... [2024-11-28 02:41:50,933 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:50" (1/1) ... [2024-11-28 02:41:50,935 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:41:50,936 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:41:50,936 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:41:50,936 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:41:50,938 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:50" (1/1) ... [2024-11-28 02:41:50,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:41:50,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:50,973 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:41:50,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:41:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:41:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:41:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 02:41:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 02:41:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 02:41:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 02:41:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 02:41:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-28 02:41:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:41:51,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:41:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 02:41:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 02:41:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 02:41:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 02:41:51,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 02:41:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 02:41:51,087 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:41:51,089 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:41:51,343 INFO L? ?]: Removed 32 outVars from TransFormulas that were not future-live. [2024-11-28 02:41:51,343 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:41:51,359 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:41:51,360 INFO L312 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-28 02:41:51,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:41:51 BoogieIcfgContainer [2024-11-28 02:41:51,360 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:41:51,363 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:41:51,363 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:41:51,371 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:41:51,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:41:50" (1/3) ... [2024-11-28 02:41:51,372 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6360295d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:41:51, skipping insertion in model container [2024-11-28 02:41:51,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:50" (2/3) ... [2024-11-28 02:41:51,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6360295d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:41:51, skipping insertion in model container [2024-11-28 02:41:51,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:41:51" (3/3) ... [2024-11-28 02:41:51,374 INFO L128 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2024-11-28 02:41:51,393 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:41:51,395 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG data_structures_set_multi_proc_ground-1.i that has 2 procedures, 44 locations, 1 initial locations, 8 loop locations, and 1 error locations. [2024-11-28 02:41:51,484 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:41:51,505 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;@5ab1d0c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:41:51,505 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 02:41:51,511 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) [2024-11-28 02:41:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 02:41:51,520 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:51,521 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:51,521 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:51,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:51,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1829362696, now seen corresponding path program 1 times [2024-11-28 02:41:51,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:51,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963685208] [2024-11-28 02:41:51,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:51,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:51,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:51,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963685208] [2024-11-28 02:41:51,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963685208] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:41:51,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:41:51,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:41:51,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639905050] [2024-11-28 02:41:51,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:41:51,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:41:51,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:51,885 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:41:51,886 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:41:51,890 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) [2024-11-28 02:41:52,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:52,026 INFO L93 Difference]: Finished difference Result 100 states and 152 transitions. [2024-11-28 02:41:52,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:41:52,030 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 [2024-11-28 02:41:52,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:52,039 INFO L225 Difference]: With dead ends: 100 [2024-11-28 02:41:52,039 INFO L226 Difference]: Without dead ends: 56 [2024-11-28 02:41:52,043 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:41:52,047 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 [2024-11-28 02:41:52,050 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] [2024-11-28 02:41:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-28 02:41:52,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2024-11-28 02:41:52,091 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) [2024-11-28 02:41:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2024-11-28 02:41:52,098 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 12 [2024-11-28 02:41:52,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:52,098 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2024-11-28 02:41:52,099 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) [2024-11-28 02:41:52,099 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2024-11-28 02:41:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 02:41:52,101 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:52,101 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:52,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:41:52,102 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:52,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:52,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1008438452, now seen corresponding path program 1 times [2024-11-28 02:41:52,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:52,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583131360] [2024-11-28 02:41:52,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:52,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:52,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:52,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583131360] [2024-11-28 02:41:52,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583131360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:52,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208812498] [2024-11-28 02:41:52,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:52,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:52,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:52,309 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:52,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:41:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:52,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 02:41:52,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:52,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:52,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208812498] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:52,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:52,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-28 02:41:52,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810032622] [2024-11-28 02:41:52,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:52,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:41:52,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:52,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:41:52,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:41:52,560 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) [2024-11-28 02:41:52,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:52,810 INFO L93 Difference]: Finished difference Result 139 states and 181 transitions. [2024-11-28 02:41:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:41:52,814 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 [2024-11-28 02:41:52,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:52,816 INFO L225 Difference]: With dead ends: 139 [2024-11-28 02:41:52,816 INFO L226 Difference]: Without dead ends: 103 [2024-11-28 02:41:52,817 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:41:52,819 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 [2024-11-28 02:41:52,820 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] [2024-11-28 02:41:52,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-28 02:41:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 47. [2024-11-28 02:41:52,838 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) [2024-11-28 02:41:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2024-11-28 02:41:52,839 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 14 [2024-11-28 02:41:52,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:52,840 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2024-11-28 02:41:52,840 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) [2024-11-28 02:41:52,840 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2024-11-28 02:41:52,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-28 02:41:52,844 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:52,844 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:52,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 02:41:53,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:53,050 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:53,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:53,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1587498216, now seen corresponding path program 2 times [2024-11-28 02:41:53,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:53,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149915485] [2024-11-28 02:41:53,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:41:53,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:53,080 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:41:53,081 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:41:53,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:53,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149915485] [2024-11-28 02:41:53,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149915485] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:41:53,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:41:53,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:41:53,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432809103] [2024-11-28 02:41:53,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:41:53,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:41:53,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:53,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:41:53,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:41:53,211 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) [2024-11-28 02:41:53,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:53,274 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2024-11-28 02:41:53,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:41:53,275 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 [2024-11-28 02:41:53,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:53,276 INFO L225 Difference]: With dead ends: 87 [2024-11-28 02:41:53,276 INFO L226 Difference]: Without dead ends: 50 [2024-11-28 02:41:53,276 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 [2024-11-28 02:41:53,277 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 [2024-11-28 02:41:53,277 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] [2024-11-28 02:41:53,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-28 02:41:53,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-28 02:41:53,283 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) [2024-11-28 02:41:53,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-11-28 02:41:53,285 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 20 [2024-11-28 02:41:53,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:53,285 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-11-28 02:41:53,285 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) [2024-11-28 02:41:53,285 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-11-28 02:41:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 02:41:53,286 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:53,286 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] [2024-11-28 02:41:53,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:41:53,286 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:53,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:53,287 INFO L85 PathProgramCache]: Analyzing trace with hash 954315980, now seen corresponding path program 1 times [2024-11-28 02:41:53,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:53,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607673319] [2024-11-28 02:41:53,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:53,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 02:41:53,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:53,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607673319] [2024-11-28 02:41:53,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607673319] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:41:53,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:41:53,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:41:53,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947387451] [2024-11-28 02:41:53,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:41:53,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:41:53,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:53,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:41:53,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:41:53,471 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) [2024-11-28 02:41:53,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:53,518 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2024-11-28 02:41:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:41:53,522 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 [2024-11-28 02:41:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:53,523 INFO L225 Difference]: With dead ends: 97 [2024-11-28 02:41:53,523 INFO L226 Difference]: Without dead ends: 63 [2024-11-28 02:41:53,524 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:41:53,524 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 [2024-11-28 02:41:53,525 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] [2024-11-28 02:41:53,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-28 02:41:53,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2024-11-28 02:41:53,539 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) [2024-11-28 02:41:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-11-28 02:41:53,542 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 34 [2024-11-28 02:41:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:53,542 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-11-28 02:41:53,542 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) [2024-11-28 02:41:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-11-28 02:41:53,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 02:41:53,543 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:53,543 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] [2024-11-28 02:41:53,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 02:41:53,544 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:53,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:53,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1237410192, now seen corresponding path program 1 times [2024-11-28 02:41:53,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:53,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220702196] [2024-11-28 02:41:53,545 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:53,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 02:41:53,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:53,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220702196] [2024-11-28 02:41:53,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220702196] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:53,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522056900] [2024-11-28 02:41:53,741 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:53,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:53,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:53,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:53,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:41:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:53,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 02:41:53,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:41:53,996 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:41:54,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522056900] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:54,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:54,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-11-28 02:41:54,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408279762] [2024-11-28 02:41:54,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:54,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 02:41:54,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:54,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 02:41:54,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:41:54,112 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) [2024-11-28 02:41:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:54,414 INFO L93 Difference]: Finished difference Result 206 states and 262 transitions. [2024-11-28 02:41:54,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 02:41:54,417 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 [2024-11-28 02:41:54,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:54,418 INFO L225 Difference]: With dead ends: 206 [2024-11-28 02:41:54,418 INFO L226 Difference]: Without dead ends: 166 [2024-11-28 02:41:54,419 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 [2024-11-28 02:41:54,424 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, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:54,424 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 169 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:41:54,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-28 02:41:54,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 76. [2024-11-28 02:41:54,450 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) [2024-11-28 02:41:54,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2024-11-28 02:41:54,451 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 36 [2024-11-28 02:41:54,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:54,451 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2024-11-28 02:41:54,451 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) [2024-11-28 02:41:54,452 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2024-11-28 02:41:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-28 02:41:54,453 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:54,453 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] [2024-11-28 02:41:54,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 02:41:54,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:54,654 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:54,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:54,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1273428208, now seen corresponding path program 1 times [2024-11-28 02:41:54,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:54,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976401715] [2024-11-28 02:41:54,655 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:54,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-11-28 02:41:54,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:54,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976401715] [2024-11-28 02:41:54,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976401715] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:41:54,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:41:54,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:41:54,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735288751] [2024-11-28 02:41:54,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:41:54,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:41:54,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:54,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:41:54,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:41:54,894 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) [2024-11-28 02:41:54,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:54,916 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2024-11-28 02:41:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:41:54,917 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 [2024-11-28 02:41:54,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:54,918 INFO L225 Difference]: With dead ends: 100 [2024-11-28 02:41:54,918 INFO L226 Difference]: Without dead ends: 67 [2024-11-28 02:41:54,918 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 [2024-11-28 02:41:54,919 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:54,919 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:41:54,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-28 02:41:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-28 02:41:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 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) [2024-11-28 02:41:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2024-11-28 02:41:54,937 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 57 [2024-11-28 02:41:54,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:54,939 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2024-11-28 02:41:54,939 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) [2024-11-28 02:41:54,940 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2024-11-28 02:41:54,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 02:41:54,941 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:54,941 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:54,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 02:41:54,941 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:54,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:54,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1808166494, now seen corresponding path program 2 times [2024-11-28 02:41:54,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:54,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326009664] [2024-11-28 02:41:54,945 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:41:54,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:55,013 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:41:55,013 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 02:41:55,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:55,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326009664] [2024-11-28 02:41:55,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326009664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:55,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929654830] [2024-11-28 02:41:55,422 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:41:55,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:55,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:55,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:55,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:41:55,598 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:41:55,598 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:55,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 02:41:55,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 02:41:55,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 02:41:56,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929654830] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:56,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:56,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-28 02:41:56,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297064504] [2024-11-28 02:41:56,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:56,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:41:56,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:56,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:41:56,043 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:41:56,044 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 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) [2024-11-28 02:41:56,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:56,457 INFO L93 Difference]: Finished difference Result 289 states and 360 transitions. [2024-11-28 02:41:56,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 02:41:56,459 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 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 [2024-11-28 02:41:56,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:56,461 INFO L225 Difference]: With dead ends: 289 [2024-11-28 02:41:56,461 INFO L226 Difference]: Without dead ends: 245 [2024-11-28 02:41:56,462 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 [2024-11-28 02:41:56,463 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 324 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:56,463 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 253 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:41:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-28 02:41:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 91. [2024-11-28 02:41:56,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 88 states have (on average 1.1022727272727273) internal successors, (97), 88 states have internal predecessors, (97), 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) [2024-11-28 02:41:56,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2024-11-28 02:41:56,489 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 58 [2024-11-28 02:41:56,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:56,489 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2024-11-28 02:41:56,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 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) [2024-11-28 02:41:56,489 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2024-11-28 02:41:56,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-28 02:41:56,495 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:56,495 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:56,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 02:41:56,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:56,696 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:56,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:56,696 INFO L85 PathProgramCache]: Analyzing trace with hash 862474962, now seen corresponding path program 3 times [2024-11-28 02:41:56,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:56,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438820649] [2024-11-28 02:41:56,696 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:41:56,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:56,762 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:41:56,764 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:41:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2024-11-28 02:41:56,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:56,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438820649] [2024-11-28 02:41:56,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438820649] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:41:56,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:41:56,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 02:41:56,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002500566] [2024-11-28 02:41:56,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:41:56,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 02:41:56,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:56,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 02:41:56,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 02:41:56,997 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 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) [2024-11-28 02:41:57,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:41:57,165 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2024-11-28 02:41:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:41:57,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 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 [2024-11-28 02:41:57,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:41:57,167 INFO L225 Difference]: With dead ends: 155 [2024-11-28 02:41:57,167 INFO L226 Difference]: Without dead ends: 122 [2024-11-28 02:41:57,167 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:41:57,168 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:41:57,168 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 174 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:41:57,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-28 02:41:57,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 100. [2024-11-28 02:41:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 97 states have (on average 1.092783505154639) internal successors, (106), 97 states have internal predecessors, (106), 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) [2024-11-28 02:41:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2024-11-28 02:41:57,185 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 82 [2024-11-28 02:41:57,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:41:57,190 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2024-11-28 02:41:57,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 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) [2024-11-28 02:41:57,190 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2024-11-28 02:41:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-28 02:41:57,191 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:41:57,191 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:57,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 02:41:57,191 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:41:57,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:57,192 INFO L85 PathProgramCache]: Analyzing trace with hash 492825784, now seen corresponding path program 1 times [2024-11-28 02:41:57,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:57,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679473014] [2024-11-28 02:41:57,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:57,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:41:58,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:58,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679473014] [2024-11-28 02:41:58,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679473014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:58,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448250068] [2024-11-28 02:41:58,111 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:58,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:58,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:58,114 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:58,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:41:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:58,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 02:41:58,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:41:58,462 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:41:59,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448250068] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:59,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:59,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-28 02:41:59,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214037480] [2024-11-28 02:41:59,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:59,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-28 02:41:59,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:59,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-28 02:41:59,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 02:41:59,630 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 49 states have internal predecessors, (123), 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) [2024-11-28 02:42:00,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:42:00,727 INFO L93 Difference]: Finished difference Result 523 states and 654 transitions. [2024-11-28 02:42:00,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-28 02:42:00,728 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 49 states have internal predecessors, (123), 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 83 [2024-11-28 02:42:00,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:42:00,731 INFO L225 Difference]: With dead ends: 523 [2024-11-28 02:42:00,731 INFO L226 Difference]: Without dead ends: 470 [2024-11-28 02:42:00,733 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 02:42:00,734 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 784 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:42:00,735 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 301 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:42:00,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2024-11-28 02:42:00,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 148. [2024-11-28 02:42:00,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.0620689655172413) internal successors, (154), 145 states have internal predecessors, (154), 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) [2024-11-28 02:42:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 156 transitions. [2024-11-28 02:42:00,777 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 156 transitions. Word has length 83 [2024-11-28 02:42:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:42:00,778 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 156 transitions. [2024-11-28 02:42:00,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 49 states have internal predecessors, (123), 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) [2024-11-28 02:42:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 156 transitions. [2024-11-28 02:42:00,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-28 02:42:00,780 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:42:00,780 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:00,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 02:42:00,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:00,984 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:42:00,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:00,985 INFO L85 PathProgramCache]: Analyzing trace with hash -822450600, now seen corresponding path program 2 times [2024-11-28 02:42:00,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:00,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493324610] [2024-11-28 02:42:00,985 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:42:00,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:01,077 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:42:01,077 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2129 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:42:03,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:03,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493324610] [2024-11-28 02:42:03,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493324610] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:03,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665469454] [2024-11-28 02:42:03,889 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:42:03,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:03,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:03,891 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:03,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:42:04,194 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:42:04,194 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:04,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 02:42:04,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2129 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:42:04,449 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:42:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2129 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 02:42:08,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665469454] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:42:08,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:42:08,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-11-28 02:42:08,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046935558] [2024-11-28 02:42:08,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:42:08,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-28 02:42:08,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:08,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-28 02:42:08,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-11-28 02:42:08,093 INFO L87 Difference]: Start difference. First operand 148 states and 156 transitions. Second operand has 97 states, 97 states have (on average 2.2577319587628866) internal successors, (219), 97 states have internal predecessors, (219), 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) [2024-11-28 02:42:11,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:42:11,731 INFO L93 Difference]: Finished difference Result 955 states and 1206 transitions. [2024-11-28 02:42:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-28 02:42:11,732 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.2577319587628866) internal successors, (219), 97 states have internal predecessors, (219), 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 131 [2024-11-28 02:42:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:42:11,736 INFO L225 Difference]: With dead ends: 955 [2024-11-28 02:42:11,736 INFO L226 Difference]: Without dead ends: 902 [2024-11-28 02:42:11,739 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-11-28 02:42:11,740 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 2031 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2125 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:42:11,740 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2125 Valid, 523 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 02:42:11,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2024-11-28 02:42:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 244. [2024-11-28 02:42:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 241 states have (on average 1.037344398340249) internal successors, (250), 241 states have internal predecessors, (250), 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) [2024-11-28 02:42:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 252 transitions. [2024-11-28 02:42:11,794 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 252 transitions. Word has length 131 [2024-11-28 02:42:11,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:42:11,795 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 252 transitions. [2024-11-28 02:42:11,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.2577319587628866) internal successors, (219), 97 states have internal predecessors, (219), 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) [2024-11-28 02:42:11,796 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 252 transitions. [2024-11-28 02:42:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2024-11-28 02:42:11,799 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:42:11,799 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:11,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 02:42:12,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 02:42:12,003 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:42:12,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:12,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1208883608, now seen corresponding path program 3 times [2024-11-28 02:42:12,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:12,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145739657] [2024-11-28 02:42:12,004 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:42:12,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:12,084 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:42:12,084 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8849 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8845 trivial. 0 not checked. [2024-11-28 02:42:12,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:12,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145739657] [2024-11-28 02:42:12,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145739657] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:12,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645765536] [2024-11-28 02:42:12,145 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:42:12,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:12,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:12,147 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:12,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:42:12,394 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:42:12,394 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:12,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:42:12,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8849 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8845 trivial. 0 not checked. [2024-11-28 02:42:12,424 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:42:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8849 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8845 trivial. 0 not checked. [2024-11-28 02:42:12,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645765536] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:42:12,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:42:12,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-28 02:42:12,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154278048] [2024-11-28 02:42:12,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:42:12,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:42:12,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:12,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:42:12,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:42:12,481 INFO L87 Difference]: Start difference. First operand 244 states and 252 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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) [2024-11-28 02:42:12,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:42:12,571 INFO L93 Difference]: Finished difference Result 365 states and 403 transitions. [2024-11-28 02:42:12,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:42:12,572 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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 227 [2024-11-28 02:42:12,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:42:12,574 INFO L225 Difference]: With dead ends: 365 [2024-11-28 02:42:12,574 INFO L226 Difference]: Without dead ends: 320 [2024-11-28 02:42:12,574 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:42:12,575 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 170 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:42:12,575 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 103 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:42:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-11-28 02:42:12,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 292. [2024-11-28 02:42:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 289 states have (on average 1.0588235294117647) internal successors, (306), 289 states have internal predecessors, (306), 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) [2024-11-28 02:42:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 308 transitions. [2024-11-28 02:42:12,591 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 308 transitions. Word has length 227 [2024-11-28 02:42:12,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:42:12,592 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 308 transitions. [2024-11-28 02:42:12,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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) [2024-11-28 02:42:12,592 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 308 transitions. [2024-11-28 02:42:12,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2024-11-28 02:42:12,595 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:42:12,595 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:12,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:42:12,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 02:42:12,796 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:42:12,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:12,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1506619056, now seen corresponding path program 4 times [2024-11-28 02:42:12,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:12,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847029884] [2024-11-28 02:42:12,797 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:42:12,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:12,981 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:42:12,981 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8993 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 8872 trivial. 0 not checked. [2024-11-28 02:42:13,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:13,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847029884] [2024-11-28 02:42:13,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847029884] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:13,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209336283] [2024-11-28 02:42:13,991 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:42:13,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:13,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:13,993 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:13,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:42:14,551 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:42:14,552 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:14,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 1338 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:42:14,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8993 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 8872 trivial. 0 not checked. [2024-11-28 02:42:14,667 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:42:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8993 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 8872 trivial. 0 not checked. [2024-11-28 02:42:14,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209336283] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:42:14,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:42:14,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2024-11-28 02:42:14,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189576016] [2024-11-28 02:42:14,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:42:14,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:42:14,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:14,869 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:42:14,869 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:42:14,870 INFO L87 Difference]: Start difference. First operand 292 states and 308 transitions. Second operand has 20 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:42:15,090 INFO L93 Difference]: Finished difference Result 529 states and 607 transitions. [2024-11-28 02:42:15,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 02:42:15,090 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2024-11-28 02:42:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:42:15,093 INFO L225 Difference]: With dead ends: 529 [2024-11-28 02:42:15,093 INFO L226 Difference]: Without dead ends: 444 [2024-11-28 02:42:15,094 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:42:15,095 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 132 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:42:15,095 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 274 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:42:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2024-11-28 02:42:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 388. [2024-11-28 02:42:15,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 385 states have (on average 1.0857142857142856) internal successors, (418), 385 states have internal predecessors, (418), 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) [2024-11-28 02:42:15,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 420 transitions. [2024-11-28 02:42:15,116 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 420 transitions. Word has length 267 [2024-11-28 02:42:15,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:42:15,118 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 420 transitions. [2024-11-28 02:42:15,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:15,119 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 420 transitions. [2024-11-28 02:42:15,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2024-11-28 02:42:15,124 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:42:15,124 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:15,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 02:42:15,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 02:42:15,325 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:42:15,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:15,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1160173344, now seen corresponding path program 5 times [2024-11-28 02:42:15,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:15,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758891133] [2024-11-28 02:42:15,326 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:42:15,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:18,618 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 95 check-sat command(s) [2024-11-28 02:42:18,619 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:42:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9761 backedges. 702 proven. 22 refuted. 0 times theorem prover too weak. 9037 trivial. 0 not checked. [2024-11-28 02:42:23,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:23,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758891133] [2024-11-28 02:42:23,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758891133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:23,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603859464] [2024-11-28 02:42:23,462 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:42:23,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:23,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:23,465 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:23,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0763d59e-ef5e-4527-8e38-b0fc463e6554/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process