./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin.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_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/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_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/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_bf07c4c1-a301-4a4d-b145-c8745bd49602/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 8d0e6bdf4ddc5b5e0cadfb452142b6477bf8c78b59a2e6398c4f283004048468 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:28:13,929 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:28:14,004 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 20:28:14,010 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:28:14,011 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:28:14,042 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:28:14,043 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:28:14,043 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:28:14,044 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:28:14,044 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:28:14,044 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:28:14,044 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:28:14,045 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:28:14,045 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:28:14,045 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:28:14,045 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:28:14,045 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:28:14,045 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:28:14,046 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:28:14,046 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:28:14,046 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:28:14,046 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:28:14,046 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:28:14,046 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:28:14,046 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:28:14,047 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:28:14,047 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:28:14,047 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:28:14,047 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:28:14,047 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:28:14,047 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:28:14,048 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:28:14,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:28:14,048 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:28:14,048 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:28:14,048 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:28:14,048 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:28:14,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:28:14,049 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:28:14,049 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:28:14,049 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:28:14,049 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:28:14,049 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:28:14,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:28:14,049 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:28:14,050 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:28:14,050 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:28:14,050 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:28:14,050 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_bf07c4c1-a301-4a4d-b145-c8745bd49602/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 -> 8d0e6bdf4ddc5b5e0cadfb452142b6477bf8c78b59a2e6398c4f283004048468 [2024-11-27 20:28:14,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:28:14,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:28:14,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:28:14,455 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:28:14,456 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:28:14,457 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin.i [2024-11-27 20:28:17,912 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/data/89c533a5f/04c1cfa9166d4e199d89c599b3a20ff7/FLAGd8d78b521 [2024-11-27 20:28:18,266 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:28:18,268 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin.i [2024-11-27 20:28:18,292 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/data/89c533a5f/04c1cfa9166d4e199d89c599b3a20ff7/FLAGd8d78b521 [2024-11-27 20:28:18,353 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/data/89c533a5f/04c1cfa9166d4e199d89c599b3a20ff7 [2024-11-27 20:28:18,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:28:18,369 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:28:18,371 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:28:18,371 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:28:18,387 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:28:18,387 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:28:18" (1/1) ... [2024-11-27 20:28:18,392 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@764e4512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:18, skipping insertion in model container [2024-11-27 20:28:18,392 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:28:18" (1/1) ... [2024-11-27 20:28:18,420 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:28:18,639 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_bf07c4c1-a301-4a4d-b145-c8745bd49602/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin.i[1564,1577] [2024-11-27 20:28:18,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:28:18,686 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:28:18,704 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_bf07c4c1-a301-4a4d-b145-c8745bd49602/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin.i[1564,1577] [2024-11-27 20:28:18,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:28:18,744 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:28:18,745 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:18 WrapperNode [2024-11-27 20:28:18,746 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:28:18,747 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:28:18,747 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:28:18,747 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:28:18,761 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:18" (1/1) ... [2024-11-27 20:28:18,769 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:18" (1/1) ... [2024-11-27 20:28:18,797 INFO L138 Inliner]: procedures = 19, calls = 63, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2024-11-27 20:28:18,797 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:28:18,798 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:28:18,798 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:28:18,798 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:28:18,809 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:18" (1/1) ... [2024-11-27 20:28:18,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:18" (1/1) ... [2024-11-27 20:28:18,816 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:18" (1/1) ... [2024-11-27 20:28:18,853 INFO L175 MemorySlicer]: Split 36 memory accesses to 6 slices as follows [2, 5, 11, 7, 4, 7]. 31 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 1, 3, 2, 1, 3]. [2024-11-27 20:28:18,853 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:18" (1/1) ... [2024-11-27 20:28:18,853 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:18" (1/1) ... [2024-11-27 20:28:18,866 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:18" (1/1) ... [2024-11-27 20:28:18,871 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:18" (1/1) ... [2024-11-27 20:28:18,873 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:18" (1/1) ... [2024-11-27 20:28:18,874 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:18" (1/1) ... [2024-11-27 20:28:18,875 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:18" (1/1) ... [2024-11-27 20:28:18,878 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:28:18,879 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:28:18,879 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:28:18,879 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:28:18,880 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:18" (1/1) ... [2024-11-27 20:28:18,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:28:18,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:28:18,919 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:28:18,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:28:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_37_0 [2024-11-27 20:28:18,960 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_37_0 [2024-11-27 20:28:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:28:18,961 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-27 20:28:18,961 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-27 20:28:18,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:28:18,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 20:28:18,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 20:28:18,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-27 20:28:18,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-27 20:28:18,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-27 20:28:18,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 20:28:18,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 20:28:18,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 20:28:18,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-27 20:28:18,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-27 20:28:18,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-27 20:28:18,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-27 20:28:18,962 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_39_to_46_0 [2024-11-27 20:28:18,962 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_39_to_46_0 [2024-11-27 20:28:18,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:28:18,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:28:18,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 20:28:18,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 20:28:18,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-27 20:28:18,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-27 20:28:18,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-27 20:28:18,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-27 20:28:18,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 20:28:18,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 20:28:18,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 20:28:19,124 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:28:19,126 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:28:19,469 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-27 20:28:19,469 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:28:19,487 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:28:19,487 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-27 20:28:19,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:28:19 BoogieIcfgContainer [2024-11-27 20:28:19,488 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:28:19,493 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:28:19,493 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:28:19,500 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:28:19,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:28:18" (1/3) ... [2024-11-27 20:28:19,502 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57717c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:28:19, skipping insertion in model container [2024-11-27 20:28:19,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:18" (2/3) ... [2024-11-27 20:28:19,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57717c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:28:19, skipping insertion in model container [2024-11-27 20:28:19,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:28:19" (3/3) ... [2024-11-27 20:28:19,505 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_divbin.i [2024-11-27 20:28:19,527 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:28:19,528 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_divbin.i that has 5 procedures, 39 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-27 20:28:19,606 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:28:19,624 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;@22fc154d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:28:19,624 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 20:28:19,629 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 25 states have (on average 1.32) internal successors, (33), 28 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-27 20:28:19,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-27 20:28:19,640 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:28:19,641 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:19,641 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:28:19,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:19,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1969051436, now seen corresponding path program 1 times [2024-11-27 20:28:19,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:19,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395214197] [2024-11-27 20:28:19,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:19,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 20:28:19,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:19,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395214197] [2024-11-27 20:28:19,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395214197] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:19,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988352331] [2024-11-27 20:28:19,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:19,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:19,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:28:19,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:28:19,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:28:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:20,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-27 20:28:20,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:28:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 20:28:20,135 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:28:20,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988352331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:28:20,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:28:20,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-27 20:28:20,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14107763] [2024-11-27 20:28:20,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:20,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 20:28:20,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:20,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 20:28:20,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 20:28:20,188 INFO L87 Difference]: Start difference. First operand has 39 states, 25 states have (on average 1.32) internal successors, (33), 28 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:28:20,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:28:20,215 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2024-11-27 20:28:20,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 20:28:20,217 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-11-27 20:28:20,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:28:20,227 INFO L225 Difference]: With dead ends: 75 [2024-11-27 20:28:20,228 INFO L226 Difference]: Without dead ends: 35 [2024-11-27 20:28:20,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 20:28:20,237 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:28:20,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:28:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-27 20:28:20,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-27 20:28:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 25 states have internal predecessors, (26), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 20:28:20,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-11-27 20:28:20,288 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2024-11-27 20:28:20,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:28:20,289 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-11-27 20:28:20,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:28:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-11-27 20:28:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-27 20:28:20,291 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:28:20,291 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:20,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 20:28:20,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-27 20:28:20,492 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:28:20,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:20,493 INFO L85 PathProgramCache]: Analyzing trace with hash 980457781, now seen corresponding path program 1 times [2024-11-27 20:28:20,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:20,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205084590] [2024-11-27 20:28:20,494 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:20,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 20:28:20,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901236725] [2024-11-27 20:28:20,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:20,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:20,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:28:20,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:28:20,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:28:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:20,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-27 20:28:20,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:28:20,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:28:20,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:28:21,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:28:21,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:28:21,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:28:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:28:21,461 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:28:21,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:21,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205084590] [2024-11-27 20:28:21,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:28:21,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901236725] [2024-11-27 20:28:21,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901236725] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:28:21,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:28:21,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-27 20:28:21,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885410011] [2024-11-27 20:28:21,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:21,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 20:28:21,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:21,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 20:28:21,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:28:21,467 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:28:21,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:28:21,897 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2024-11-27 20:28:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:28:21,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-11-27 20:28:21,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:28:21,901 INFO L225 Difference]: With dead ends: 63 [2024-11-27 20:28:21,902 INFO L226 Difference]: Without dead ends: 59 [2024-11-27 20:28:21,902 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:28:21,903 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:28:21,904 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 170 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:28:21,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-27 20:28:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2024-11-27 20:28:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2024-11-27 20:28:21,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-11-27 20:28:21,922 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 27 [2024-11-27 20:28:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:28:21,923 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-11-27 20:28:21,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:28:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-11-27 20:28:21,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-27 20:28:21,924 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:28:21,925 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:21,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 20:28:22,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:22,129 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:28:22,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:22,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1861226537, now seen corresponding path program 1 times [2024-11-27 20:28:22,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:22,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325781972] [2024-11-27 20:28:22,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:22,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 20:28:22,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273392097] [2024-11-27 20:28:22,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:22,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:22,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:28:22,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:28:22,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:28:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:23,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 20:28:23,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:28:23,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:28:23,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:28:23,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:28:23,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:28:23,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:28:23,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:28:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:28:23,371 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:28:23,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:23,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325781972] [2024-11-27 20:28:23,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:28:23,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273392097] [2024-11-27 20:28:23,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273392097] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:28:23,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:28:23,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-27 20:28:23,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690967119] [2024-11-27 20:28:23,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:23,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:28:23,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:23,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:28:23,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:28:23,374 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:28:23,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:28:23,906 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2024-11-27 20:28:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:28:23,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2024-11-27 20:28:23,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:28:23,909 INFO L225 Difference]: With dead ends: 64 [2024-11-27 20:28:23,911 INFO L226 Difference]: Without dead ends: 58 [2024-11-27 20:28:23,911 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:28:23,912 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:28:23,913 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 98 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:28:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-27 20:28:23,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2024-11-27 20:28:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 39 states have internal predecessors, (42), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-27 20:28:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2024-11-27 20:28:23,950 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 37 [2024-11-27 20:28:23,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:28:23,951 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2024-11-27 20:28:23,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:28:23,951 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2024-11-27 20:28:23,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-27 20:28:23,952 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:28:23,954 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:23,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 20:28:24,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:24,155 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:28:24,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash -979590019, now seen corresponding path program 1 times [2024-11-27 20:28:24,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:24,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491204217] [2024-11-27 20:28:24,156 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:24,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:28:25,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:25,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491204217] [2024-11-27 20:28:25,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491204217] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:28:25,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:28:25,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-27 20:28:25,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503633615] [2024-11-27 20:28:25,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:25,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:28:25,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:25,987 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:28:25,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:28:25,988 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 8 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 20:28:26,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:28:26,549 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2024-11-27 20:28:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:28:26,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2024-11-27 20:28:26,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:28:26,552 INFO L225 Difference]: With dead ends: 104 [2024-11-27 20:28:26,553 INFO L226 Difference]: Without dead ends: 58 [2024-11-27 20:28:26,554 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:28:26,555 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:28:26,557 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 99 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 20:28:26,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-27 20:28:26,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-27 20:28:26,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-27 20:28:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-11-27 20:28:26,588 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 38 [2024-11-27 20:28:26,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:28:26,588 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-11-27 20:28:26,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 20:28:26,589 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-11-27 20:28:26,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-27 20:28:26,593 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:28:26,593 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:26,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 20:28:26,593 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:28:26,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:26,594 INFO L85 PathProgramCache]: Analyzing trace with hash 68652246, now seen corresponding path program 1 times [2024-11-27 20:28:26,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:26,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424419468] [2024-11-27 20:28:26,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:26,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 20:28:26,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612736290] [2024-11-27 20:28:26,730 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:26,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:26,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:28:26,733 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:28:26,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:28:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:27,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-27 20:28:27,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:28:27,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:28:27,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:28:27,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:28:27,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:28:27,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:28:27,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:28:27,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2024-11-27 20:28:27,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-27 20:28:27,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-27 20:28:27,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-27 20:28:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 20:28:27,685 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:28:28,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:28,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424419468] [2024-11-27 20:28:28,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:28:28,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612736290] [2024-11-27 20:28:28,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612736290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:28,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:28:28,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-11-27 20:28:28,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207740284] [2024-11-27 20:28:28,784 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 20:28:28,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 20:28:28,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:28,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 20:28:28,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:28:28,785 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 12 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-27 20:28:29,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:28:29,316 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2024-11-27 20:28:29,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 20:28:29,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2024-11-27 20:28:29,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:28:29,319 INFO L225 Difference]: With dead ends: 78 [2024-11-27 20:28:29,321 INFO L226 Difference]: Without dead ends: 76 [2024-11-27 20:28:29,321 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-27 20:28:29,322 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 36 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:28:29,323 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 240 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 20:28:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-27 20:28:29,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2024-11-27 20:28:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 50 states have internal predecessors, (53), 13 states have call successors, (13), 9 states have call predecessors, (13), 12 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-27 20:28:29,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2024-11-27 20:28:29,352 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 44 [2024-11-27 20:28:29,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:28:29,353 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2024-11-27 20:28:29,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-27 20:28:29,353 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2024-11-27 20:28:29,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-27 20:28:29,355 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:28:29,355 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:29,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 20:28:29,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:29,556 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:28:29,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:29,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1125616302, now seen corresponding path program 1 times [2024-11-27 20:28:29,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:29,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246065686] [2024-11-27 20:28:29,558 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:29,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 20:28:32,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:32,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246065686] [2024-11-27 20:28:32,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246065686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:32,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941513168] [2024-11-27 20:28:32,297 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:32,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:32,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:28:32,302 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:28:32,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:28:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:32,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-11-27 20:28:32,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:28:32,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:28:32,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:28:32,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:28:32,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:28:32,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:29:05,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:29:09,562 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#A~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#r~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#A~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#r~0#1.offset_BEFORE_CALL_7| Int)) (= (select (select |c_#memory_int#3| |v_ULTIMATE.start_main_~#r~0#1.base_BEFORE_CALL_7|) |v_ULTIMATE.start_main_~#r~0#1.offset_BEFORE_CALL_7|) (select (select |c_#memory_int#4| |v_ULTIMATE.start_main_~#A~0#1.base_BEFORE_CALL_7|) |v_ULTIMATE.start_main_~#A~0#1.offset_BEFORE_CALL_7|))) is different from true [2024-11-27 20:29:18,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-11-27 20:29:18,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:29:18,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2024-11-27 20:29:43,037 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#A~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~#B~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#A~0#1.offset_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~#B~0#1.base_BEFORE_CALL_2| Int)) (<= (mod (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~#B~0#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_main_~#B~0#1.offset_BEFORE_CALL_2|) 4294967296) (mod (select (select |c_#memory_int#4| |v_ULTIMATE.start_main_~#A~0#1.base_BEFORE_CALL_8|) |v_ULTIMATE.start_main_~#A~0#1.offset_BEFORE_CALL_8|) 4294967296))) is different from true [2024-11-27 20:29:43,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:30:33,470 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-27 20:30:33,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 39 [2024-11-27 20:30:33,489 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-27 20:30:33,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2024-11-27 20:30:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 4 not checked. [2024-11-27 20:30:33,500 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:30:35,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:30:38,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941513168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:30:38,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:30:38,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2024-11-27 20:30:38,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175864134] [2024-11-27 20:30:38,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:30:38,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-27 20:30:38,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:30:38,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-27 20:30:38,268 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2408, Unknown=27, NotChecked=202, Total=2862 [2024-11-27 20:30:38,269 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 42 states, 32 states have (on average 1.78125) internal successors, (57), 35 states have internal predecessors, (57), 15 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (15), 12 states have call predecessors, (15), 14 states have call successors, (15) [2024-11-27 20:30:42,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:30:54,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:30:58,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:31:02,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:31:06,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:31:10,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:31:14,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:31:19,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:31:23,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:31:27,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:32:00,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:32:15,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:32:34,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:32:38,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:32:42,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:33:02,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:33:06,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:33:10,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:33:14,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:33:18,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:33:39,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:33:59,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-27 20:34:03,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-27 20:34:07,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:34:11,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:34:15,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:34:19,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:34:23,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:34:27,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:34:31,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:34:36,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:34:40,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:34:56,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:35:00,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:35:04,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:35:08,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:35:32,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:35:37,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:35:41,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:35:45,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:35:49,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:35:53,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:35:57,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:36:01,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:36:05,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-27 20:36:09,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-27 20:36:14,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-27 20:36:18,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:36:22,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:36:26,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:36:30,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:36:34,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:36:38,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:36:46,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:36:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:36:46,934 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2024-11-27 20:36:46,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-27 20:36:46,936 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 32 states have (on average 1.78125) internal successors, (57), 35 states have internal predecessors, (57), 15 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (15), 12 states have call predecessors, (15), 14 states have call successors, (15) Word has length 56 [2024-11-27 20:36:46,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:36:46,937 INFO L225 Difference]: With dead ends: 90 [2024-11-27 20:36:46,937 INFO L226 Difference]: Without dead ends: 78 [2024-11-27 20:36:46,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 272.2s TimeCoverageRelationStatistics Valid=641, Invalid=5467, Unknown=62, NotChecked=310, Total=6480 [2024-11-27 20:36:46,943 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 100 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 56 mSolverCounterUnsat, 57 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 217.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 57 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 219.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:36:46,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 153 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 978 Invalid, 57 Unknown, 154 Unchecked, 219.2s Time] [2024-11-27 20:36:46,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-27 20:36:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2024-11-27 20:36:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 47 states have internal predecessors, (48), 13 states have call successors, (13), 8 states have call predecessors, (13), 11 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2024-11-27 20:36:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2024-11-27 20:36:46,970 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 56 [2024-11-27 20:36:46,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:36:46,970 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2024-11-27 20:36:46,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 32 states have (on average 1.78125) internal successors, (57), 35 states have internal predecessors, (57), 15 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (15), 12 states have call predecessors, (15), 14 states have call successors, (15) [2024-11-27 20:36:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2024-11-27 20:36:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-27 20:36:46,973 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:36:46,973 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:36:46,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 20:36:47,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-27 20:36:47,174 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:36:47,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:36:47,175 INFO L85 PathProgramCache]: Analyzing trace with hash 250139196, now seen corresponding path program 2 times [2024-11-27 20:36:47,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:36:47,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359196673] [2024-11-27 20:36:47,175 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:36:47,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:36:47,376 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:36:47,376 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:36:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:36:52,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:36:52,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359196673] [2024-11-27 20:36:52,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359196673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:36:52,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519028377] [2024-11-27 20:36:52,891 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:36:52,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:36:52,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:36:52,893 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:36:52,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:36:53,786 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:36:53,787 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:36:53,791 WARN L254 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 214 conjuncts are in the unsatisfiable core [2024-11-27 20:36:53,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:36:53,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:36:53,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:36:57,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:36:57,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:36:57,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:36:57,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:37:03,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:37:08,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2024-11-27 20:37:15,609 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-11-27 20:37:15,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2024-11-27 20:37:15,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2024-11-27 20:37:16,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:37:16,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 64 [2024-11-27 20:37:17,039 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-27 20:37:17,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:37:44,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-27 20:37:44,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:37:44,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 133 [2024-11-27 20:37:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 20:37:44,901 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:37:49,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519028377] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:37:49,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:37:49,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28] total 45 [2024-11-27 20:37:49,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274633806] [2024-11-27 20:37:49,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:37:49,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-27 20:37:49,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:37:49,330 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-27 20:37:49,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2642, Unknown=8, NotChecked=0, Total=2862 [2024-11-27 20:37:49,331 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 45 states, 36 states have (on average 1.75) internal successors, (63), 33 states have internal predecessors, (63), 14 states have call successors, (17), 11 states have call predecessors, (17), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-27 20:37:53,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:38:08,711 WARN L286 SmtUtils]: Spent 8.24s on a formula simplification. DAG size of input: 97 DAG size of output: 96 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 20:38:15,027 WARN L286 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 122 DAG size of output: 103 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 20:38:23,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:38:36,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:38:40,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-27 20:38:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:38:40,465 INFO L93 Difference]: Finished difference Result 153 states and 182 transitions. [2024-11-27 20:38:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-27 20:38:40,466 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 36 states have (on average 1.75) internal successors, (63), 33 states have internal predecessors, (63), 14 states have call successors, (17), 11 states have call predecessors, (17), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 55 [2024-11-27 20:38:40,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:38:40,468 INFO L225 Difference]: With dead ends: 153 [2024-11-27 20:38:40,469 INFO L226 Difference]: Without dead ends: 104 [2024-11-27 20:38:40,471 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 79.6s TimeCoverageRelationStatistics Valid=375, Invalid=4724, Unknown=13, NotChecked=0, Total=5112 [2024-11-27 20:38:40,472 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 80 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 35 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2024-11-27 20:38:40,472 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 188 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1180 Invalid, 10 Unknown, 0 Unchecked, 22.9s Time] [2024-11-27 20:38:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-27 20:38:40,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2024-11-27 20:38:40,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 70 states have internal predecessors, (72), 18 states have call successors, (18), 14 states have call predecessors, (18), 17 states have return successors, (27), 17 states have call predecessors, (27), 16 states have call successors, (27) [2024-11-27 20:38:40,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2024-11-27 20:38:40,524 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 55 [2024-11-27 20:38:40,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:38:40,524 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2024-11-27 20:38:40,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 36 states have (on average 1.75) internal successors, (63), 33 states have internal predecessors, (63), 14 states have call successors, (17), 11 states have call predecessors, (17), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-27 20:38:40,524 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2024-11-27 20:38:40,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-27 20:38:40,526 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:38:40,526 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:38:40,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 20:38:40,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-27 20:38:40,727 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:38:40,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:38:40,727 INFO L85 PathProgramCache]: Analyzing trace with hash -161588605, now seen corresponding path program 3 times [2024-11-27 20:38:40,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:38:40,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771612293] [2024-11-27 20:38:40,727 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:38:40,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:38:41,360 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 20:38:41,360 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 20:38:41,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87758560] [2024-11-27 20:38:41,366 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:38:41,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:38:41,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:38:41,371 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:38:41,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf07c4c1-a301-4a4d-b145-c8745bd49602/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:38:45,951 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 20:38:45,951 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:38:45,959 WARN L254 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 302 conjuncts are in the unsatisfiable core [2024-11-27 20:38:45,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:38:45,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:38:46,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:38:46,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:38:46,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:38:46,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:38:46,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:38:47,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:38:47,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:38:49,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 41 [2024-11-27 20:38:54,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2024-11-27 20:38:54,419 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-27 20:38:54,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2024-11-27 20:38:55,193 INFO L349 Elim1Store]: treesize reduction 18, result has 52.6 percent of original size [2024-11-27 20:38:55,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 86 [2024-11-27 20:38:55,387 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-11-27 20:38:55,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2024-11-27 20:38:59,912 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:38:59,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 111 [2024-11-27 20:39:00,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 130 [2024-11-27 20:39:00,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:39:01,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:39:01,128 INFO L349 Elim1Store]: treesize reduction 44, result has 47.0 percent of original size [2024-11-27 20:39:01,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 226 treesize of output 218 [2024-11-27 20:39:03,202 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:39:03,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 347 treesize of output 427 [2024-11-27 20:39:03,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 215 [2024-11-27 20:39:03,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:39:03,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 219 treesize of output 315 [2024-11-27 20:40:18,583 WARN L286 SmtUtils]: Spent 6.34s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:40:46,825 WARN L286 SmtUtils]: Spent 5.52s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:40:56,484 WARN L286 SmtUtils]: Spent 5.99s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:41:17,847 WARN L286 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:41:43,543 WARN L286 SmtUtils]: Spent 9.70s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:42:03,703 WARN L286 SmtUtils]: Spent 5.52s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:42:18,340 WARN L286 SmtUtils]: Spent 12.88s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:42:57,773 WARN L286 SmtUtils]: Spent 5.62s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:43:09,171 WARN L286 SmtUtils]: Spent 7.30s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)