./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/modn.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/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_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/modn.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/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_d643077f-7e6b-4d01-a982-543aeaf94869/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 b1b107a3e17c36933ddc5a5cff6ab95f9f0d71df794eec32ec4a28d109efd829 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:18:39,584 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:18:39,657 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:18:39,662 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:18:39,662 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:18:39,687 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:18:39,688 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:18:39,688 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:18:39,689 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:18:39,689 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:18:39,689 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:18:39,689 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:18:39,689 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:18:39,690 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:18:39,690 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:18:39,690 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:18:39,690 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:18:39,690 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:18:39,690 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:18:39,691 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:18:39,691 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:18:39,691 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:18:39,691 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:18:39,691 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:18:39,691 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:18:39,691 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:18:39,691 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:18:39,691 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:18:39,692 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:18:39,692 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:18:39,692 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:18:39,692 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:18:39,692 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:18:39,692 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:18:39,693 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:18:39,693 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:18:39,693 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:18:39,695 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:18:39,695 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:18:39,695 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:18:39,695 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:18:39,696 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:18:39,696 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:18:39,696 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:18:39,696 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:18:39,696 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:18:39,696 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:18:39,696 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:18:39,696 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_d643077f-7e6b-4d01-a982-543aeaf94869/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 -> b1b107a3e17c36933ddc5a5cff6ab95f9f0d71df794eec32ec4a28d109efd829 [2024-11-28 04:18:40,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:18:40,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:18:40,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:18:40,043 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:18:40,043 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:18:40,045 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-fpi/modn.c [2024-11-28 04:18:43,005 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/data/e6527353b/33f4dab06e0b4b35865024176fb45018/FLAG7efbf3c0b [2024-11-28 04:18:43,312 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:18:43,313 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/sv-benchmarks/c/array-fpi/modn.c [2024-11-28 04:18:43,324 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/data/e6527353b/33f4dab06e0b4b35865024176fb45018/FLAG7efbf3c0b [2024-11-28 04:18:43,345 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/data/e6527353b/33f4dab06e0b4b35865024176fb45018 [2024-11-28 04:18:43,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:18:43,350 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:18:43,351 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:18:43,351 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:18:43,360 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:18:43,364 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:18:43" (1/1) ... [2024-11-28 04:18:43,365 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cc3fa39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:43, skipping insertion in model container [2024-11-28 04:18:43,365 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:18:43" (1/1) ... [2024-11-28 04:18:43,380 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:18:43,546 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_d643077f-7e6b-4d01-a982-543aeaf94869/sv-benchmarks/c/array-fpi/modn.c[587,600] [2024-11-28 04:18:43,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:18:43,575 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:18:43,584 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_d643077f-7e6b-4d01-a982-543aeaf94869/sv-benchmarks/c/array-fpi/modn.c[587,600] [2024-11-28 04:18:43,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:18:43,604 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:18:43,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:43 WrapperNode [2024-11-28 04:18:43,605 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:18:43,606 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:18:43,606 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:18:43,606 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:18:43,613 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:43" (1/1) ... [2024-11-28 04:18:43,620 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:43" (1/1) ... [2024-11-28 04:18:43,637 INFO L138 Inliner]: procedures = 17, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2024-11-28 04:18:43,637 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:18:43,638 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:18:43,638 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:18:43,638 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:18:43,648 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:43" (1/1) ... [2024-11-28 04:18:43,649 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:43" (1/1) ... [2024-11-28 04:18:43,653 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:43" (1/1) ... [2024-11-28 04:18:43,675 INFO L175 MemorySlicer]: Split 15 memory accesses to 4 slices as follows [2, 7, 2, 4]. 47 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 3 writes are split as follows [0, 0, 1, 2]. [2024-11-28 04:18:43,677 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:43" (1/1) ... [2024-11-28 04:18:43,677 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:43" (1/1) ... [2024-11-28 04:18:43,686 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:43" (1/1) ... [2024-11-28 04:18:43,690 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:43" (1/1) ... [2024-11-28 04:18:43,697 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:43" (1/1) ... [2024-11-28 04:18:43,699 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:43" (1/1) ... [2024-11-28 04:18:43,704 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:43" (1/1) ... [2024-11-28 04:18:43,707 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:18:43,708 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:18:43,708 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:18:43,708 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:18:43,709 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:43" (1/1) ... [2024-11-28 04:18:43,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:18:43,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:43,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:18:43,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:18:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:18:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:18:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:18:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 04:18:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-28 04:18:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 04:18:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:18:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:18:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-28 04:18:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-28 04:18:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:18:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:18:43,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:18:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:18:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:18:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 04:18:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-28 04:18:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 04:18:43,851 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:18:43,853 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:18:44,012 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-28 04:18:44,013 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:18:44,022 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:18:44,022 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 04:18:44,023 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:18:44 BoogieIcfgContainer [2024-11-28 04:18:44,023 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:18:44,025 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:18:44,025 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:18:44,030 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:18:44,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:18:43" (1/3) ... [2024-11-28 04:18:44,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56459946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:18:44, skipping insertion in model container [2024-11-28 04:18:44,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:43" (2/3) ... [2024-11-28 04:18:44,032 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56459946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:18:44, skipping insertion in model container [2024-11-28 04:18:44,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:18:44" (3/3) ... [2024-11-28 04:18:44,033 INFO L128 eAbstractionObserver]: Analyzing ICFG modn.c [2024-11-28 04:18:44,050 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:18:44,051 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG modn.c that has 1 procedures, 21 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 04:18:44,104 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:18:44,116 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;@51bd3125, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:18:44,116 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:18:44,120 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-28 04:18:44,126 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:44,127 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:44,127 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:44,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1602504550, now seen corresponding path program 1 times [2024-11-28 04:18:44,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:44,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227847426] [2024-11-28 04:18:44,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:44,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:44,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:44,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227847426] [2024-11-28 04:18:44,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227847426] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:18:44,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:18:44,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:18:44,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855800141] [2024-11-28 04:18:44,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:18:44,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:18:44,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:44,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:18:44,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:18:44,341 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:44,357 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2024-11-28 04:18:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 04:18:44,363 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-28 04:18:44,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:44,370 INFO L225 Difference]: With dead ends: 38 [2024-11-28 04:18:44,371 INFO L226 Difference]: Without dead ends: 17 [2024-11-28 04:18:44,375 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:18:44,382 INFO L435 NwaCegarLoop]: 24 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, 24 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 [2024-11-28 04:18:44,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:18:44,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-28 04:18:44,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-28 04:18:44,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-11-28 04:18:44,424 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2024-11-28 04:18:44,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:44,425 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-11-28 04:18:44,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:44,426 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-11-28 04:18:44,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-28 04:18:44,427 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:44,427 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:44,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:18:44,428 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:44,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:44,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1995531560, now seen corresponding path program 1 times [2024-11-28 04:18:44,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:44,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879174535] [2024-11-28 04:18:44,430 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:44,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:44,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:44,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879174535] [2024-11-28 04:18:44,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879174535] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:18:44,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:18:44,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:18:44,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362292355] [2024-11-28 04:18:44,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:18:44,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:18:44,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:44,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:18:44,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:18:44,680 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:44,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:44,774 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-11-28 04:18:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:18:44,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-28 04:18:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:44,776 INFO L225 Difference]: With dead ends: 37 [2024-11-28 04:18:44,776 INFO L226 Difference]: Without dead ends: 27 [2024-11-28 04:18:44,777 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:18:44,778 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:44,778 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 13 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:18:44,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-28 04:18:44,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2024-11-28 04:18:44,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:44,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-11-28 04:18:44,804 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2024-11-28 04:18:44,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:44,804 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-11-28 04:18:44,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:44,805 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-11-28 04:18:44,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-28 04:18:44,805 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:44,805 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:44,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:18:44,806 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:44,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:44,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1229753632, now seen corresponding path program 1 times [2024-11-28 04:18:44,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:44,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704456625] [2024-11-28 04:18:44,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:44,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:46,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:46,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704456625] [2024-11-28 04:18:46,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704456625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:46,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090409255] [2024-11-28 04:18:46,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:46,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:46,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:46,086 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:46,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:18:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:46,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 04:18:46,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:46,267 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 [2024-11-28 04:18:46,372 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 [2024-11-28 04:18:46,567 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 [2024-11-28 04:18:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:46,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:46,936 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 14 treesize of output 12 [2024-11-28 04:18:46,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 16 [2024-11-28 04:18:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:47,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090409255] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:47,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:18:47,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-11-28 04:18:47,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495405023] [2024-11-28 04:18:47,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:47,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 04:18:47,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:47,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 04:18:47,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:18:47,341 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:47,981 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2024-11-28 04:18:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 04:18:47,981 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-28 04:18:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:47,982 INFO L225 Difference]: With dead ends: 66 [2024-11-28 04:18:47,982 INFO L226 Difference]: Without dead ends: 64 [2024-11-28 04:18:47,983 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 04:18:47,984 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 190 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:47,984 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 98 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:18:47,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-28 04:18:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 31. [2024-11-28 04:18:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-28 04:18:47,997 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 17 [2024-11-28 04:18:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:47,997 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-28 04:18:47,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-28 04:18:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-28 04:18:47,999 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:47,999 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:48,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:18:48,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:48,204 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:48,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:48,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1311617576, now seen corresponding path program 2 times [2024-11-28 04:18:48,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:48,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287555811] [2024-11-28 04:18:48,205 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:18:48,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:48,240 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:18:48,240 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:48,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:48,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287555811] [2024-11-28 04:18:48,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287555811] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:48,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605793254] [2024-11-28 04:18:48,398 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:18:48,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:48,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:48,402 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:48,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:18:48,475 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:18:48,475 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:48,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:18:48,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:48,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:48,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605793254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:48,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:18:48,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-28 04:18:48,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152245382] [2024-11-28 04:18:48,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:48,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:18:48,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:48,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:18:48,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:18:48,643 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:49,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:49,009 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2024-11-28 04:18:49,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:18:49,010 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-28 04:18:49,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:49,011 INFO L225 Difference]: With dead ends: 85 [2024-11-28 04:18:49,011 INFO L226 Difference]: Without dead ends: 74 [2024-11-28 04:18:49,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:18:49,012 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 81 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:49,012 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 83 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:18:49,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-28 04:18:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 38. [2024-11-28 04:18:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-11-28 04:18:49,027 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 21 [2024-11-28 04:18:49,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:49,027 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-11-28 04:18:49,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:49,028 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-11-28 04:18:49,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-28 04:18:49,028 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:49,028 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:49,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 04:18:49,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:49,229 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:49,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:49,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1863956058, now seen corresponding path program 1 times [2024-11-28 04:18:49,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:49,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954666805] [2024-11-28 04:18:49,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:49,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:18:49,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:49,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954666805] [2024-11-28 04:18:49,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954666805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:49,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142965259] [2024-11-28 04:18:49,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:49,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:49,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:49,343 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:49,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:18:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:49,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:18:49,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:18:49,502 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:18:49,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142965259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:49,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:18:49,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-28 04:18:49,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030423922] [2024-11-28 04:18:49,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:49,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:18:49,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:49,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:18:49,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:18:49,566 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:49,686 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2024-11-28 04:18:49,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:18:49,688 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-28 04:18:49,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:49,688 INFO L225 Difference]: With dead ends: 72 [2024-11-28 04:18:49,689 INFO L226 Difference]: Without dead ends: 50 [2024-11-28 04:18:49,689 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:18:49,689 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:49,690 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:18:49,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-28 04:18:49,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2024-11-28 04:18:49,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2024-11-28 04:18:49,705 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 21 [2024-11-28 04:18:49,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:49,705 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2024-11-28 04:18:49,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2024-11-28 04:18:49,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 04:18:49,706 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:49,707 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:49,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 04:18:49,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:49,907 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:49,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:49,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1350776240, now seen corresponding path program 3 times [2024-11-28 04:18:49,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:49,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682241440] [2024-11-28 04:18:49,908 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:18:49,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:49,955 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 04:18:49,955 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:18:49,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005687052] [2024-11-28 04:18:49,958 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:18:49,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:49,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:49,961 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:49,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:18:50,058 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 04:18:50,058 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:50,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 04:18:50,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:50,087 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 [2024-11-28 04:18:50,124 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 [2024-11-28 04:18:50,164 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 [2024-11-28 04:18:50,212 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 [2024-11-28 04:18:50,352 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 13 treesize of output 9 [2024-11-28 04:18:50,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:18:50,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:18:54,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:18:54,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:18:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:54,851 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:55,464 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 28 treesize of output 26 [2024-11-28 04:18:55,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 96 treesize of output 94 [2024-11-28 04:18:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:56,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:56,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682241440] [2024-11-28 04:18:56,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:18:56,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005687052] [2024-11-28 04:18:56,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005687052] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:56,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:18:56,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2024-11-28 04:18:56,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863815912] [2024-11-28 04:18:56,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:56,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 04:18:56,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:56,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 04:18:56,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=597, Unknown=1, NotChecked=0, Total=702 [2024-11-28 04:18:56,335 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:10,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:19:29,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-11-28 04:19:29,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:19:29,961 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2024-11-28 04:19:29,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 04:19:29,962 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-28 04:19:29,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:19:29,963 INFO L225 Difference]: With dead ends: 106 [2024-11-28 04:19:29,963 INFO L226 Difference]: Without dead ends: 104 [2024-11-28 04:19:29,965 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=511, Invalid=2138, Unknown=3, NotChecked=0, Total=2652 [2024-11-28 04:19:29,968 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 235 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 56 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:19:29,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 231 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 747 Invalid, 2 Unknown, 0 Unchecked, 10.5s Time] [2024-11-28 04:19:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-28 04:19:29,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 42. [2024-11-28 04:19:29,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:29,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-11-28 04:19:29,989 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 25 [2024-11-28 04:19:29,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:19:29,990 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-11-28 04:19:29,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:29,990 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-11-28 04:19:29,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 04:19:29,991 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:19:29,991 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:19:30,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 04:19:30,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 04:19:30,192 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:19:30,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:19:30,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1496499182, now seen corresponding path program 2 times [2024-11-28 04:19:30,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:19:30,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139932865] [2024-11-28 04:19:30,193 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:19:30,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:19:30,231 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:19:30,231 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:19:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:19:31,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:19:31,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139932865] [2024-11-28 04:19:31,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139932865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:19:31,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633952111] [2024-11-28 04:19:31,369 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:19:31,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:19:31,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:19:31,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:19:31,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:19:31,450 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:19:31,450 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:19:31,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 04:19:31,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:19:31,526 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 [2024-11-28 04:19:31,633 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 [2024-11-28 04:19:31,717 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 [2024-11-28 04:19:31,950 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 [2024-11-28 04:19:32,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-28 04:19:33,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:19:33,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2024-11-28 04:19:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:19:33,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:19:34,296 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 176 treesize of output 164 [2024-11-28 04:19:34,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:19:34,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 380 treesize of output 358 [2024-11-28 04:19:36,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:19:36,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633952111] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:19:36,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:19:36,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 34 [2024-11-28 04:19:36,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319220069] [2024-11-28 04:19:36,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:19:36,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 04:19:36,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:19:36,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 04:19:36,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 04:19:36,222 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:49,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:19:49,032 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2024-11-28 04:19:49,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 04:19:49,033 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-28 04:19:49,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:19:49,034 INFO L225 Difference]: With dead ends: 129 [2024-11-28 04:19:49,034 INFO L226 Difference]: Without dead ends: 127 [2024-11-28 04:19:49,036 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=576, Invalid=2616, Unknown=0, NotChecked=0, Total=3192 [2024-11-28 04:19:49,037 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 428 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:19:49,037 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 161 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 04:19:49,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-28 04:19:49,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 60. [2024-11-28 04:19:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2024-11-28 04:19:49,063 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 25 [2024-11-28 04:19:49,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:19:49,063 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2024-11-28 04:19:49,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2024-11-28 04:19:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 04:19:49,064 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:19:49,064 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:19:49,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 04:19:49,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 04:19:49,265 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:19:49,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:19:49,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1913773236, now seen corresponding path program 4 times [2024-11-28 04:19:49,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:19:49,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493182721] [2024-11-28 04:19:49,266 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:19:49,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:19:49,303 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:19:49,303 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:19:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:19:49,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:19:49,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493182721] [2024-11-28 04:19:49,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493182721] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:19:49,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098816402] [2024-11-28 04:19:49,625 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:19:49,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:19:49,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:19:49,628 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:19:49,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:19:49,713 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:19:49,714 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:19:49,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:19:49,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:19:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:19:49,928 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:19:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:19:50,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098816402] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:19:50,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:19:50,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2024-11-28 04:19:50,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498402099] [2024-11-28 04:19:50,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:19:50,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:19:50,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:19:50,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:19:50,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:19:50,145 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:51,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:19:51,040 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2024-11-28 04:19:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 04:19:51,041 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-28 04:19:51,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:19:51,042 INFO L225 Difference]: With dead ends: 106 [2024-11-28 04:19:51,042 INFO L226 Difference]: Without dead ends: 92 [2024-11-28 04:19:51,042 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:19:51,043 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 118 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:19:51,043 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 108 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 04:19:51,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-28 04:19:51,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 56. [2024-11-28 04:19:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:51,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2024-11-28 04:19:51,064 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 27 [2024-11-28 04:19:51,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:19:51,064 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2024-11-28 04:19:51,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:51,065 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2024-11-28 04:19:51,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 04:19:51,065 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:19:51,066 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:19:51,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 04:19:51,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:19:51,270 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:19:51,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:19:51,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2091379704, now seen corresponding path program 5 times [2024-11-28 04:19:51,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:19:51,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225203450] [2024-11-28 04:19:51,270 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:19:51,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:19:51,333 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 04:19:51,333 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:19:51,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598670648] [2024-11-28 04:19:51,338 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:19:51,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:19:51,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:19:51,342 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:19:51,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:19:51,457 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 04:19:51,457 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:19:51,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 04:19:51,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:19:51,594 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 [2024-11-28 04:19:51,750 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 [2024-11-28 04:19:51,863 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 [2024-11-28 04:19:51,996 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 [2024-11-28 04:19:52,153 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 [2024-11-28 04:19:52,471 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 13 treesize of output 9 [2024-11-28 04:19:52,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:19:52,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:19:53,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:19:53,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:19:57,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:19:57,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:19:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:19:57,559 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:19:58,504 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 35 treesize of output 33 [2024-11-28 04:19:58,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 107510 treesize of output 106486 [2024-11-28 04:19:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:19:59,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:19:59,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225203450] [2024-11-28 04:19:59,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:19:59,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598670648] [2024-11-28 04:19:59,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598670648] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:19:59,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:19:59,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2024-11-28 04:19:59,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790190470] [2024-11-28 04:19:59,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:19:59,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 04:19:59,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:19:59,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 04:19:59,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=915, Unknown=1, NotChecked=0, Total=1056 [2024-11-28 04:19:59,864 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:20:19,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:20:35,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:20:52,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:52,364 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2024-11-28 04:20:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 04:20:52,365 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-28 04:20:52,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:52,366 INFO L225 Difference]: With dead ends: 142 [2024-11-28 04:20:52,366 INFO L226 Difference]: Without dead ends: 140 [2024-11-28 04:20:52,367 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=748, Invalid=3540, Unknown=2, NotChecked=0, Total=4290 [2024-11-28 04:20:52,368 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 364 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 93 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:52,368 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 239 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 979 Invalid, 2 Unknown, 0 Unchecked, 12.3s Time] [2024-11-28 04:20:52,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-28 04:20:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 66. [2024-11-28 04:20:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 65 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:20:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2024-11-28 04:20:52,394 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 29 [2024-11-28 04:20:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:52,395 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2024-11-28 04:20:52,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:20:52,395 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2024-11-28 04:20:52,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 04:20:52,396 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:52,396 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:52,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 04:20:52,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:52,600 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:20:52,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:52,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1210277002, now seen corresponding path program 3 times [2024-11-28 04:20:52,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:52,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000164754] [2024-11-28 04:20:52,600 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:20:52,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:52,630 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 04:20:52,630 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:20:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:20:55,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:55,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000164754] [2024-11-28 04:20:55,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000164754] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:55,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42829479] [2024-11-28 04:20:55,539 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:20:55,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:55,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:55,541 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:55,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:20:55,627 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:20:55,628 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:20:55,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 04:20:55,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:55,686 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 [2024-11-28 04:20:55,797 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 [2024-11-28 04:20:55,905 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 [2024-11-28 04:20:56,337 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 17 treesize of output 13 [2024-11-28 04:20:57,731 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-28 04:20:57,731 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 47 treesize of output 25 [2024-11-28 04:20:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:20:57,825 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:58,854 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 18 treesize of output 16 [2024-11-28 04:20:58,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 16 [2024-11-28 04:21:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:21:00,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42829479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:21:00,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:21:00,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 14] total 42 [2024-11-28 04:21:00,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138904342] [2024-11-28 04:21:00,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:21:00,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-28 04:21:00,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:21:00,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-28 04:21:00,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1519, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 04:21:00,138 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:21:04,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:21:04,544 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2024-11-28 04:21:04,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 04:21:04,545 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-28 04:21:04,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:21:04,546 INFO L225 Difference]: With dead ends: 100 [2024-11-28 04:21:04,546 INFO L226 Difference]: Without dead ends: 70 [2024-11-28 04:21:04,547 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=609, Invalid=2931, Unknown=0, NotChecked=0, Total=3540 [2024-11-28 04:21:04,547 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 156 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:21:04,548 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 72 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 04:21:04,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-28 04:21:04,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2024-11-28 04:21:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:21:04,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2024-11-28 04:21:04,566 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 29 [2024-11-28 04:21:04,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:21:04,566 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2024-11-28 04:21:04,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:21:04,567 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2024-11-28 04:21:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 04:21:04,567 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:21:04,567 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:21:04,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 04:21:04,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 04:21:04,768 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:21:04,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:21:04,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1489203452, now seen corresponding path program 6 times [2024-11-28 04:21:04,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:21:04,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2844409] [2024-11-28 04:21:04,769 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:21:04,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:21:04,814 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 04:21:04,815 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:21:05,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:21:05,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2844409] [2024-11-28 04:21:05,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2844409] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:21:05,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162432739] [2024-11-28 04:21:05,310 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:21:05,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:05,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:21:05,313 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:21:05,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:21:05,430 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 04:21:05,431 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:05,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:21:05,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:21:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:21:05,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:21:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:21:06,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162432739] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:21:06,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:21:06,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-28 04:21:06,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574707036] [2024-11-28 04:21:06,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:21:06,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:21:06,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:21:06,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:21:06,193 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:21:06,194 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:21:07,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:21:07,236 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2024-11-28 04:21:07,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:21:07,236 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-28 04:21:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:21:07,237 INFO L225 Difference]: With dead ends: 129 [2024-11-28 04:21:07,237 INFO L226 Difference]: Without dead ends: 122 [2024-11-28 04:21:07,238 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:21:07,238 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 143 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:21:07,239 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 166 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:21:07,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-28 04:21:07,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 62. [2024-11-28 04:21:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:21:07,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2024-11-28 04:21:07,263 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 31 [2024-11-28 04:21:07,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:21:07,264 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2024-11-28 04:21:07,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:21:07,264 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2024-11-28 04:21:07,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 04:21:07,265 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:21:07,265 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:21:07,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 04:21:07,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:07,466 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:21:07,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:21:07,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1812453254, now seen corresponding path program 4 times [2024-11-28 04:21:07,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:21:07,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030574015] [2024-11-28 04:21:07,466 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:21:07,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:21:07,495 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:21:07,495 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:21:08,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:21:08,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030574015] [2024-11-28 04:21:08,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030574015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:21:08,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139068071] [2024-11-28 04:21:08,584 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:21:08,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:08,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:21:08,586 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:21:08,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:21:08,676 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:21:08,676 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:08,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 04:21:08,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:21:08,858 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 [2024-11-28 04:21:09,023 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 286 treesize of output 210 [2024-11-28 04:21:09,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 63 [2024-11-28 04:21:14,202 INFO L349 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2024-11-28 04:21:14,203 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 3 case distinctions, treesize of input 178 treesize of output 121 [2024-11-28 04:21:19,132 INFO L349 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2024-11-28 04:21:19,132 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 3 case distinctions, treesize of input 178 treesize of output 121 [2024-11-28 04:21:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 17 refuted. 2 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:21:41,376 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:21:43,885 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 463 treesize of output 447 [2024-11-28 04:21:43,946 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:21:43,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7545 treesize of output 7439 [2024-11-28 04:21:44,092 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 1577 treesize of output 1473 [2024-11-28 04:21:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:21:46,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139068071] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:21:46,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:21:46,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2024-11-28 04:21:46,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760492923] [2024-11-28 04:21:46,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:21:46,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 04:21:46,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:21:46,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 04:21:46,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=564, Unknown=7, NotChecked=0, Total=702 [2024-11-28 04:21:46,756 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:21:51,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:21:55,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:21:59,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:22:04,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:22:08,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:22:12,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:22:16,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:22:20,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:22:24,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:22:28,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:22:28,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:22:28,396 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2024-11-28 04:22:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:22:28,397 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-28 04:22:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:22:28,398 INFO L225 Difference]: With dead ends: 83 [2024-11-28 04:22:28,398 INFO L226 Difference]: Without dead ends: 81 [2024-11-28 04:22:28,398 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=140, Invalid=609, Unknown=7, NotChecked=0, Total=756 [2024-11-28 04:22:28,399 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 88 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 22 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:22:28,399 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 104 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 282 Invalid, 10 Unknown, 0 Unchecked, 41.5s Time] [2024-11-28 04:22:28,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-28 04:22:28,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2024-11-28 04:22:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:22:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2024-11-28 04:22:28,430 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 31 [2024-11-28 04:22:28,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:22:28,430 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2024-11-28 04:22:28,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:22:28,430 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2024-11-28 04:22:28,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 04:22:28,431 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:22:28,431 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:22:28,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:22:28,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:22:28,632 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:22:28,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:22:28,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2101710400, now seen corresponding path program 7 times [2024-11-28 04:22:28,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:22:28,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566185255] [2024-11-28 04:22:28,632 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:22:28,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:22:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:22:28,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380073372] [2024-11-28 04:22:28,656 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:22:28,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:22:28,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:22:28,659 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:22:28,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:22:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:22:28,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-28 04:22:28,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:22:28,887 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 [2024-11-28 04:22:28,985 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 [2024-11-28 04:22:29,108 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 [2024-11-28 04:22:29,250 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 [2024-11-28 04:22:29,345 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 [2024-11-28 04:22:29,466 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 [2024-11-28 04:22:29,756 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 13 treesize of output 9 [2024-11-28 04:22:29,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:22:29,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:22:30,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:22:30,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:22:30,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:22:30,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:22:34,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:22:34,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:22:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:22:34,938 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:22:35,946 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 42 treesize of output 40 [2024-11-28 04:22:35,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6678 treesize of output 6646 [2024-11-28 04:22:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:22:37,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:22:37,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566185255] [2024-11-28 04:22:37,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:22:37,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380073372] [2024-11-28 04:22:37,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380073372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:22:37,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:22:37,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2024-11-28 04:22:37,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256276691] [2024-11-28 04:22:37,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:22:37,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 04:22:37,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:22:37,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 04:22:37,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1086, Unknown=1, NotChecked=0, Total=1260 [2024-11-28 04:22:37,576 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:22:54,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-28 04:22:58,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-28 04:23:03,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-28 04:23:07,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-28 04:23:26,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:23:51,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-28 04:23:55,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.83s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-28 04:24:01,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:24:01,646 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2024-11-28 04:24:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-28 04:24:01,647 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-28 04:24:01,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:24:01,648 INFO L225 Difference]: With dead ends: 165 [2024-11-28 04:24:01,648 INFO L226 Difference]: Without dead ends: 163 [2024-11-28 04:24:01,649 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 55.6s TimeCoverageRelationStatistics Valid=1015, Invalid=4681, Unknown=4, NotChecked=0, Total=5700 [2024-11-28 04:24:01,650 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 432 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 121 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:24:01,651 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 297 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1184 Invalid, 6 Unknown, 0 Unchecked, 35.2s Time] [2024-11-28 04:24:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-28 04:24:01,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 62. [2024-11-28 04:24:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:24:01,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2024-11-28 04:24:01,687 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 33 [2024-11-28 04:24:01,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:24:01,687 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2024-11-28 04:24:01,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:24:01,688 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2024-11-28 04:24:01,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 04:24:01,688 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:24:01,688 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:24:01,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 04:24:01,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:24:01,893 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:24:01,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:24:01,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2060489796, now seen corresponding path program 5 times [2024-11-28 04:24:01,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:24:01,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613081698] [2024-11-28 04:24:01,894 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:24:01,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:24:01,945 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:24:01,951 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:24:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:24:03,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:24:03,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613081698] [2024-11-28 04:24:03,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613081698] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:24:03,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110051923] [2024-11-28 04:24:03,016 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:24:03,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:24:03,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:24:03,019 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:24:03,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:24:03,134 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:24:03,135 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:24:03,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 04:24:03,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:24:03,233 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 [2024-11-28 04:24:03,354 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 [2024-11-28 04:24:03,479 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 19 treesize of output 11 [2024-11-28 04:24:03,605 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 [2024-11-28 04:24:03,833 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 [2024-11-28 04:24:04,042 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 29 treesize of output 13 [2024-11-28 04:24:04,212 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 25 treesize of output 24 [2024-11-28 04:24:05,942 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:24:05,942 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 56 treesize of output 30 [2024-11-28 04:24:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:24:06,088 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:24:08,531 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 224 treesize of output 212 [2024-11-28 04:24:08,556 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:24:08,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 842 treesize of output 822 [2024-11-28 04:24:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:24:11,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110051923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:24:11,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:24:11,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 39 [2024-11-28 04:24:11,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706209813] [2024-11-28 04:24:11,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:24:11,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 04:24:11,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:24:11,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 04:24:11,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 04:24:11,969 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:24:15,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:24:20,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:24:23,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:25:05,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:25:05,237 INFO L93 Difference]: Finished difference Result 186 states and 201 transitions. [2024-11-28 04:25:05,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 04:25:05,238 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-28 04:25:05,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:25:05,239 INFO L225 Difference]: With dead ends: 186 [2024-11-28 04:25:05,239 INFO L226 Difference]: Without dead ends: 184 [2024-11-28 04:25:05,241 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 48.1s TimeCoverageRelationStatistics Valid=835, Invalid=4715, Unknown=0, NotChecked=0, Total=5550 [2024-11-28 04:25:05,242 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 553 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 36 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:25:05,242 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 177 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 786 Invalid, 3 Unknown, 0 Unchecked, 10.7s Time] [2024-11-28 04:25:05,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-28 04:25:05,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 91. [2024-11-28 04:25:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 90 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:25:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2024-11-28 04:25:05,294 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 33 [2024-11-28 04:25:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:25:05,294 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2024-11-28 04:25:05,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:25:05,295 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2024-11-28 04:25:05,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 04:25:05,295 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:25:05,295 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:25:05,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 04:25:05,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:25:05,496 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:25:05,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:25:05,496 INFO L85 PathProgramCache]: Analyzing trace with hash 642707780, now seen corresponding path program 8 times [2024-11-28 04:25:05,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:25:05,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264653328] [2024-11-28 04:25:05,496 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:25:05,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:25:05,520 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:25:05,520 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:25:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:25:06,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:25:06,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264653328] [2024-11-28 04:25:06,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264653328] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:25:06,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954466256] [2024-11-28 04:25:06,239 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:25:06,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:25:06,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:25:06,241 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:25:06,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:25:06,349 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:25:06,349 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:25:06,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:25:06,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:25:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:25:07,001 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:25:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:25:07,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954466256] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:25:07,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:25:07,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-28 04:25:07,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306488615] [2024-11-28 04:25:07,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:25:07,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:25:07,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:25:07,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:25:07,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:25:07,627 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:25:09,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:25:09,772 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2024-11-28 04:25:09,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 04:25:09,772 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-28 04:25:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:25:09,773 INFO L225 Difference]: With dead ends: 154 [2024-11-28 04:25:09,773 INFO L226 Difference]: Without dead ends: 136 [2024-11-28 04:25:09,774 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 04:25:09,775 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 139 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:25:09,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 188 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 04:25:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-28 04:25:09,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 87. [2024-11-28 04:25:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.127906976744186) internal successors, (97), 86 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:25:09,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2024-11-28 04:25:09,822 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 35 [2024-11-28 04:25:09,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:25:09,822 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2024-11-28 04:25:09,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:25:09,822 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2024-11-28 04:25:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 04:25:09,823 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:25:09,823 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:25:09,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 04:25:10,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:25:10,023 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:25:10,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:25:10,024 INFO L85 PathProgramCache]: Analyzing trace with hash 368188552, now seen corresponding path program 9 times [2024-11-28 04:25:10,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:25:10,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753461896] [2024-11-28 04:25:10,024 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:25:10,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:25:10,060 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 04:25:10,060 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:25:10,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567034715] [2024-11-28 04:25:10,061 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:25:10,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:25:10,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:25:10,065 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:25:10,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:25:10,317 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 04:25:10,317 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:25:10,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-28 04:25:10,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:25:10,483 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 [2024-11-28 04:25:10,607 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 [2024-11-28 04:25:10,737 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 [2024-11-28 04:25:10,887 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 [2024-11-28 04:25:11,066 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 [2024-11-28 04:25:11,203 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 [2024-11-28 04:25:11,360 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 [2024-11-28 04:25:11,768 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 13 treesize of output 9 [2024-11-28 04:25:11,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-28 04:25:12,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-28 04:25:12,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-28 04:25:12,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-28 04:25:12,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-28 04:25:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:25:13,336 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:25:14,597 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 54 treesize of output 52 [2024-11-28 04:25:14,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 54657014 treesize of output 54525942 [2024-11-28 04:25:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:25:16,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:25:16,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753461896] [2024-11-28 04:25:16,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:25:16,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567034715] [2024-11-28 04:25:16,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567034715] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:25:16,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:25:16,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2024-11-28 04:25:16,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001663254] [2024-11-28 04:25:16,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:25:16,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-28 04:25:16,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:25:16,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-28 04:25:16,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1494, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 04:25:16,721 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:25:46,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:25:46,245 INFO L93 Difference]: Finished difference Result 332 states and 361 transitions. [2024-11-28 04:25:46,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2024-11-28 04:25:46,246 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-28 04:25:46,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:25:46,249 INFO L225 Difference]: With dead ends: 332 [2024-11-28 04:25:46,249 INFO L226 Difference]: Without dead ends: 330 [2024-11-28 04:25:46,253 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5560 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=3013, Invalid=16727, Unknown=0, NotChecked=0, Total=19740 [2024-11-28 04:25:46,254 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 726 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:25:46,254 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 465 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1563 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-11-28 04:25:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-11-28 04:25:46,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 141. [2024-11-28 04:25:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1857142857142857) internal successors, (166), 140 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:25:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 166 transitions. [2024-11-28 04:25:46,355 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 166 transitions. Word has length 37 [2024-11-28 04:25:46,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:25:46,356 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 166 transitions. [2024-11-28 04:25:46,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 42 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:25:46,356 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 166 transitions. [2024-11-28 04:25:46,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 04:25:46,357 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:25:46,357 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:25:46,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 04:25:46,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:25:46,558 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:25:46,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:25:46,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1287682626, now seen corresponding path program 6 times [2024-11-28 04:25:46,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:25:46,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875743552] [2024-11-28 04:25:46,558 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:25:46,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:25:46,590 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-28 04:25:46,590 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:25:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:25:47,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:25:47,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875743552] [2024-11-28 04:25:47,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875743552] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:25:47,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058070166] [2024-11-28 04:25:47,042 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:25:47,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:25:47,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:25:47,045 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:25:47,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:25:47,221 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-28 04:25:47,221 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:25:47,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:25:47,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:25:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:25:47,761 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:25:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:25:48,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058070166] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:25:48,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:25:48,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-28 04:25:48,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660771180] [2024-11-28 04:25:48,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:25:48,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 04:25:48,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:25:48,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 04:25:48,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:25:48,191 INFO L87 Difference]: Start difference. First operand 141 states and 166 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:25:48,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:25:48,959 INFO L93 Difference]: Finished difference Result 202 states and 229 transitions. [2024-11-28 04:25:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:25:48,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-28 04:25:48,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:25:48,961 INFO L225 Difference]: With dead ends: 202 [2024-11-28 04:25:48,961 INFO L226 Difference]: Without dead ends: 155 [2024-11-28 04:25:48,962 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:25:48,962 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:25:48,963 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 51 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:25:48,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-28 04:25:49,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 133. [2024-11-28 04:25:49,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 132 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:25:49,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 156 transitions. [2024-11-28 04:25:49,047 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 156 transitions. Word has length 37 [2024-11-28 04:25:49,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:25:49,047 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 156 transitions. [2024-11-28 04:25:49,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:25:49,047 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 156 transitions. [2024-11-28 04:25:49,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 04:25:49,048 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:25:49,048 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:25:49,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 04:25:49,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:25:49,249 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:25:49,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:25:49,249 INFO L85 PathProgramCache]: Analyzing trace with hash -2050335348, now seen corresponding path program 10 times [2024-11-28 04:25:49,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:25:49,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702782846] [2024-11-28 04:25:49,249 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:25:49,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:25:49,271 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:25:49,271 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:25:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:25:50,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:25:50,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702782846] [2024-11-28 04:25:50,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702782846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:25:50,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513985265] [2024-11-28 04:25:50,267 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:25:50,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:25:50,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:25:50,269 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:25:50,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:25:50,472 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:25:50,473 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:25:50,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:25:50,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:25:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:25:51,217 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:25:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:25:52,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513985265] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:25:52,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:25:52,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2024-11-28 04:25:52,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896933467] [2024-11-28 04:25:52,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:25:52,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:25:52,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:25:52,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:25:52,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:25:52,018 INFO L87 Difference]: Start difference. First operand 133 states and 156 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:25:54,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:25:54,425 INFO L93 Difference]: Finished difference Result 232 states and 258 transitions. [2024-11-28 04:25:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 04:25:54,425 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-28 04:25:54,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:25:54,426 INFO L225 Difference]: With dead ends: 232 [2024-11-28 04:25:54,426 INFO L226 Difference]: Without dead ends: 214 [2024-11-28 04:25:54,427 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 15 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=359, Invalid=1123, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 04:25:54,427 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 160 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:25:54,427 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 211 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 04:25:54,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-28 04:25:54,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 111. [2024-11-28 04:25:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1636363636363636) internal successors, (128), 110 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:25:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2024-11-28 04:25:54,489 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 39 [2024-11-28 04:25:54,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:25:54,489 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2024-11-28 04:25:54,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:25:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2024-11-28 04:25:54,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-28 04:25:54,490 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:25:54,490 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:25:54,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 04:25:54,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 04:25:54,691 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:25:54,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:25:54,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2075945264, now seen corresponding path program 11 times [2024-11-28 04:25:54,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:25:54,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122976734] [2024-11-28 04:25:54,691 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:25:54,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:25:54,722 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 04:25:54,722 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:25:54,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104368888] [2024-11-28 04:25:54,723 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:25:54,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:25:54,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:25:54,725 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:25:54,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:25:55,008 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 04:25:55,008 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:25:55,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-28 04:25:55,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:25:55,042 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 [2024-11-28 04:25:55,089 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 [2024-11-28 04:25:55,141 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 [2024-11-28 04:25:55,191 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 [2024-11-28 04:25:55,257 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 [2024-11-28 04:25:55,319 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 [2024-11-28 04:25:55,394 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 [2024-11-28 04:25:55,469 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 [2024-11-28 04:25:55,656 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 13 treesize of output 9 [2024-11-28 04:25:55,812 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 29 treesize of output 13 [2024-11-28 04:25:55,991 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 29 treesize of output 13 [2024-11-28 04:25:56,166 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 25 treesize of output 24 [2024-11-28 04:25:56,388 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:25:56,389 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 1 case distinctions, treesize of input 40 treesize of output 27 [2024-11-28 04:25:56,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:25:56,797 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 1 case distinctions, treesize of input 36 treesize of output 38 [2024-11-28 04:25:57,224 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:25:57,225 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 3 case distinctions, treesize of input 51 treesize of output 41 [2024-11-28 04:25:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:25:57,785 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:26:01,576 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 371 treesize of output 363 [2024-11-28 04:26:01,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 32389331 treesize of output 32355347 [2024-11-28 04:26:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:05,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:26:05,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122976734] [2024-11-28 04:26:05,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:26:05,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104368888] [2024-11-28 04:26:05,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104368888] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:26:05,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:26:05,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 42 [2024-11-28 04:26:05,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660925572] [2024-11-28 04:26:05,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:26:05,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-28 04:26:05,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:26:05,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-28 04:26:05,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1574, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 04:26:05,052 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:34,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:26:34,305 INFO L93 Difference]: Finished difference Result 522 states and 564 transitions. [2024-11-28 04:26:34,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-11-28 04:26:34,306 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-28 04:26:34,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:26:34,308 INFO L225 Difference]: With dead ends: 522 [2024-11-28 04:26:34,308 INFO L226 Difference]: Without dead ends: 520 [2024-11-28 04:26:34,310 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3947 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=1080, Invalid=12726, Unknown=0, NotChecked=0, Total=13806 [2024-11-28 04:26:34,311 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 841 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 2863 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 2991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:26:34,311 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 1036 Invalid, 2991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2863 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2024-11-28 04:26:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2024-11-28 04:26:34,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 137. [2024-11-28 04:26:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1764705882352942) internal successors, (160), 136 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:34,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 160 transitions. [2024-11-28 04:26:34,417 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 160 transitions. Word has length 41 [2024-11-28 04:26:34,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:26:34,417 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 160 transitions. [2024-11-28 04:26:34,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:34,417 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 160 transitions. [2024-11-28 04:26:34,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-28 04:26:34,418 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:26:34,418 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:26:34,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 04:26:34,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:34,618 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:26:34,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:26:34,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1013879412, now seen corresponding path program 7 times [2024-11-28 04:26:34,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:26:34,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609782660] [2024-11-28 04:26:34,619 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:26:34,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:26:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:26:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:26:35,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:26:35,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609782660] [2024-11-28 04:26:35,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609782660] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:26:35,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710363090] [2024-11-28 04:26:35,331 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:26:35,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:35,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:26:35,334 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:26:35,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 04:26:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:26:35,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:26:35,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:26:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 34 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:26:36,041 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:26:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 34 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:26:36,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710363090] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:26:36,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:26:36,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2024-11-28 04:26:36,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782917120] [2024-11-28 04:26:36,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:26:36,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:26:36,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:26:36,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:26:36,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:26:36,498 INFO L87 Difference]: Start difference. First operand 137 states and 160 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:37,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:26:37,428 INFO L93 Difference]: Finished difference Result 208 states and 232 transitions. [2024-11-28 04:26:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:26:37,428 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-28 04:26:37,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:26:37,430 INFO L225 Difference]: With dead ends: 208 [2024-11-28 04:26:37,430 INFO L226 Difference]: Without dead ends: 183 [2024-11-28 04:26:37,430 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:26:37,431 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 146 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:26:37,431 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 75 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 04:26:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-28 04:26:37,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 153. [2024-11-28 04:26:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.1513157894736843) internal successors, (175), 152 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 175 transitions. [2024-11-28 04:26:37,537 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 175 transitions. Word has length 41 [2024-11-28 04:26:37,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:26:37,537 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 175 transitions. [2024-11-28 04:26:37,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:37,538 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 175 transitions. [2024-11-28 04:26:37,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-28 04:26:37,538 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:26:37,538 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:26:37,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 04:26:37,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:37,739 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:26:37,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:26:37,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1638005622, now seen corresponding path program 8 times [2024-11-28 04:26:37,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:26:37,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051308950] [2024-11-28 04:26:37,740 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:26:37,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:26:37,761 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:26:37,761 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:26:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:26:40,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:26:40,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051308950] [2024-11-28 04:26:40,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051308950] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:26:40,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789970410] [2024-11-28 04:26:40,257 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:26:40,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:40,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:26:40,260 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:26:40,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 04:26:40,391 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:26:40,391 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:26:40,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-28 04:26:40,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:26:40,599 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 [2024-11-28 04:26:41,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 91 [2024-11-28 04:26:42,156 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 369 treesize of output 265 [2024-11-28 04:26:42,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 125 [2024-11-28 04:26:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:26:48,272 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:26:50,318 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 90 treesize of output 86 [2024-11-28 04:26:50,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:26:50,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 428 treesize of output 416 [2024-11-28 04:26:50,347 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 297 treesize of output 225 [2024-11-28 04:26:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:26:50,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789970410] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:26:50,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:26:50,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15, 14] total 45 [2024-11-28 04:26:50,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148371879] [2024-11-28 04:26:50,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:26:50,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 04:26:50,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:26:50,868 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 04:26:50,868 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1779, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 04:26:50,868 INFO L87 Difference]: Start difference. First operand 153 states and 175 transitions. Second operand has 45 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:27:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:27:26,946 INFO L93 Difference]: Finished difference Result 225 states and 247 transitions. [2024-11-28 04:27:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-28 04:27:26,946 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-28 04:27:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:27:26,947 INFO L225 Difference]: With dead ends: 225 [2024-11-28 04:27:26,947 INFO L226 Difference]: Without dead ends: 197 [2024-11-28 04:27:26,948 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=783, Invalid=5853, Unknown=6, NotChecked=0, Total=6642 [2024-11-28 04:27:26,949 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 272 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:27:26,949 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 348 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-28 04:27:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-28 04:27:27,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 142. [2024-11-28 04:27:27,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1631205673758864) internal successors, (164), 141 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:27:27,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 164 transitions. [2024-11-28 04:27:27,068 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 164 transitions. Word has length 41 [2024-11-28 04:27:27,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:27:27,068 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 164 transitions. [2024-11-28 04:27:27,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:27:27,068 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 164 transitions. [2024-11-28 04:27:27,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:27:27,069 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:27:27,069 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:27:27,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-28 04:27:27,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 04:27:27,270 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:27:27,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:27:27,270 INFO L85 PathProgramCache]: Analyzing trace with hash -599018028, now seen corresponding path program 12 times [2024-11-28 04:27:27,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:27:27,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922954185] [2024-11-28 04:27:27,270 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:27:27,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:27:27,305 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-28 04:27:27,305 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:27:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:27:28,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:27:28,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922954185] [2024-11-28 04:27:28,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922954185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:27:28,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515111016] [2024-11-28 04:27:28,322 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:27:28,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:27:28,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:27:28,324 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:27:28,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 04:27:28,595 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-28 04:27:28,595 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:27:28,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:27:28,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:27:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:27:29,432 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:27:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:27:30,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515111016] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:27:30,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:27:30,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-11-28 04:27:30,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020975791] [2024-11-28 04:27:30,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:27:30,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:27:30,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:27:30,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:27:30,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:27:30,326 INFO L87 Difference]: Start difference. First operand 142 states and 164 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:27:33,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:27:33,278 INFO L93 Difference]: Finished difference Result 274 states and 302 transitions. [2024-11-28 04:27:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 04:27:33,279 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-28 04:27:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:27:33,280 INFO L225 Difference]: With dead ends: 274 [2024-11-28 04:27:33,280 INFO L226 Difference]: Without dead ends: 256 [2024-11-28 04:27:33,281 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 16 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=440, Invalid=1540, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 04:27:33,282 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 189 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:27:33,283 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 306 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-28 04:27:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-28 04:27:33,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 134. [2024-11-28 04:27:33,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1353383458646618) internal successors, (151), 133 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:27:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 151 transitions. [2024-11-28 04:27:33,380 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 151 transitions. Word has length 43 [2024-11-28 04:27:33,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:27:33,381 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 151 transitions. [2024-11-28 04:27:33,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:27:33,381 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 151 transitions. [2024-11-28 04:27:33,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:27:33,381 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:27:33,381 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:27:33,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 04:27:33,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 04:27:33,582 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:27:33,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:27:33,582 INFO L85 PathProgramCache]: Analyzing trace with hash -917270764, now seen corresponding path program 13 times [2024-11-28 04:27:33,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:27:33,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614945481] [2024-11-28 04:27:33,582 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:27:33,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:27:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:27:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:27:34,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:27:34,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614945481] [2024-11-28 04:27:34,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614945481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:27:34,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447687370] [2024-11-28 04:27:34,561 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:27:34,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:27:34,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:27:34,563 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:27:34,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 04:27:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:27:34,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:27:34,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:27:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:27:35,671 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:27:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:27:36,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447687370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:27:36,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:27:36,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-11-28 04:27:36,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666816114] [2024-11-28 04:27:36,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:27:36,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:27:36,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:27:36,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:27:36,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:27:36,421 INFO L87 Difference]: Start difference. First operand 134 states and 151 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:27:37,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:27:37,740 INFO L93 Difference]: Finished difference Result 245 states and 266 transitions. [2024-11-28 04:27:37,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:27:37,740 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-28 04:27:37,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:27:37,741 INFO L225 Difference]: With dead ends: 245 [2024-11-28 04:27:37,741 INFO L226 Difference]: Without dead ends: 209 [2024-11-28 04:27:37,742 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 61 SyntacticMatches, 15 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 04:27:37,742 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 274 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:27:37,742 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 138 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 04:27:37,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-11-28 04:27:37,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 152. [2024-11-28 04:27:37,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0927152317880795) internal successors, (165), 151 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:27:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2024-11-28 04:27:37,858 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 43 [2024-11-28 04:27:37,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:27:37,858 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2024-11-28 04:27:37,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:27:37,858 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2024-11-28 04:27:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:27:37,858 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:27:37,858 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:27:37,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 04:27:38,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-28 04:27:38,059 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:27:38,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:27:38,059 INFO L85 PathProgramCache]: Analyzing trace with hash 463047824, now seen corresponding path program 9 times [2024-11-28 04:27:38,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:27:38,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321239550] [2024-11-28 04:27:38,059 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:27:38,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:27:38,085 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 04:27:38,085 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:27:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:27:38,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:27:38,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321239550] [2024-11-28 04:27:38,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321239550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:27:38,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108893824] [2024-11-28 04:27:38,658 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:27:38,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:27:38,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:27:38,661 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:27:38,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 04:27:38,849 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 04:27:38,849 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:27:38,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-28 04:27:38,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:27:38,932 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 [2024-11-28 04:27:39,044 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 [2024-11-28 04:27:39,116 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 [2024-11-28 04:27:39,210 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 [2024-11-28 04:27:39,297 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 [2024-11-28 04:27:39,451 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 [2024-11-28 04:27:39,693 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 16 treesize of output 12 [2024-11-28 04:27:39,797 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 29 treesize of output 28 [2024-11-28 04:27:40,038 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:27:40,038 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 1 case distinctions, treesize of input 48 treesize of output 31 [2024-11-28 04:27:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:27:40,935 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:27:42,796 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 225 treesize of output 217 [2024-11-28 04:27:42,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 863 treesize of output 835 [2024-11-28 04:27:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:27:45,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108893824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:27:45,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:27:45,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 20] total 52 [2024-11-28 04:27:45,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552090337] [2024-11-28 04:27:45,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:27:45,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-28 04:27:45,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:27:45,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-28 04:27:45,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2360, Unknown=0, NotChecked=0, Total=2652 [2024-11-28 04:27:45,182 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:27:51,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:27:51,477 INFO L93 Difference]: Finished difference Result 241 states and 258 transitions. [2024-11-28 04:27:51,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 04:27:51,478 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-28 04:27:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:27:51,479 INFO L225 Difference]: With dead ends: 241 [2024-11-28 04:27:51,479 INFO L226 Difference]: Without dead ends: 189 [2024-11-28 04:27:51,480 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1109, Invalid=5863, Unknown=0, NotChecked=0, Total=6972 [2024-11-28 04:27:51,480 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 430 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:27:51,480 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 171 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-28 04:27:51,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-28 04:27:51,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 156. [2024-11-28 04:27:51,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0838709677419356) internal successors, (168), 155 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:27:51,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 168 transitions. [2024-11-28 04:27:51,630 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 168 transitions. Word has length 43 [2024-11-28 04:27:51,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:27:51,630 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 168 transitions. [2024-11-28 04:27:51,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:27:51,630 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 168 transitions. [2024-11-28 04:27:51,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 04:27:51,630 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:27:51,631 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:27:51,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-28 04:27:51,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 04:27:51,831 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:27:51,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:27:51,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1070595352, now seen corresponding path program 14 times [2024-11-28 04:27:51,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:27:51,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912419942] [2024-11-28 04:27:51,831 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:27:51,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:27:51,855 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:27:51,855 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:27:51,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471070286] [2024-11-28 04:27:51,857 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:27:51,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:27:51,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:27:51,859 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:27:51,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 04:27:52,040 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:27:52,041 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:27:52,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-28 04:27:52,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:27:52,139 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 [2024-11-28 04:27:52,217 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 [2024-11-28 04:27:52,322 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 [2024-11-28 04:27:52,409 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 [2024-11-28 04:27:52,513 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 [2024-11-28 04:27:52,605 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 [2024-11-28 04:27:52,719 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 [2024-11-28 04:27:52,836 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 [2024-11-28 04:27:52,949 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 [2024-11-28 04:27:53,240 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 13 treesize of output 9 [2024-11-28 04:27:53,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-28 04:27:53,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-28 04:27:53,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-28 04:27:54,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-28 04:27:54,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-28 04:27:54,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-28 04:27:55,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-28 04:27:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:27:55,635 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:27:57,371 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 70 treesize of output 68 [2024-11-28 04:27:58,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 130056978446 treesize of output 129989869582 [2024-11-28 04:28:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:28:04,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:28:04,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912419942] [2024-11-28 04:28:04,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:28:04,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471070286] [2024-11-28 04:28:04,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471070286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:28:04,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:28:04,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 46 [2024-11-28 04:28:04,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028219120] [2024-11-28 04:28:04,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:28:04,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-28 04:28:04,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:28:04,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-28 04:28:04,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1900, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 04:28:04,888 INFO L87 Difference]: Start difference. First operand 156 states and 168 transitions. Second operand has 46 states, 46 states have (on average 1.891304347826087) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:28:32,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:28:32,044 INFO L93 Difference]: Finished difference Result 582 states and 620 transitions. [2024-11-28 04:28:32,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-11-28 04:28:32,045 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.891304347826087) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-28 04:28:32,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:28:32,047 INFO L225 Difference]: With dead ends: 582 [2024-11-28 04:28:32,048 INFO L226 Difference]: Without dead ends: 580 [2024-11-28 04:28:32,050 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3521 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=1150, Invalid=13130, Unknown=0, NotChecked=0, Total=14280 [2024-11-28 04:28:32,050 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 1131 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 3100 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1131 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 3256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 3100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:28:32,051 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1131 Valid, 1092 Invalid, 3256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 3100 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2024-11-28 04:28:32,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2024-11-28 04:28:32,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 192. [2024-11-28 04:28:32,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.1099476439790577) internal successors, (212), 191 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:28:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 212 transitions. [2024-11-28 04:28:32,282 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 212 transitions. Word has length 45 [2024-11-28 04:28:32,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:28:32,282 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 212 transitions. [2024-11-28 04:28:32,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.891304347826087) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:28:32,282 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 212 transitions. [2024-11-28 04:28:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 04:28:32,283 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:28:32,283 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:28:32,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 04:28:32,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 04:28:32,483 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:28:32,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:28:32,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1844053356, now seen corresponding path program 10 times [2024-11-28 04:28:32,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:28:32,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924216226] [2024-11-28 04:28:32,484 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:28:32,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:28:32,507 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:28:32,508 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:28:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-28 04:28:34,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:28:34,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924216226] [2024-11-28 04:28:34,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924216226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:28:34,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950918838] [2024-11-28 04:28:34,281 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:28:34,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:28:34,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:28:34,283 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:28:34,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 04:28:34,440 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:28:34,440 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:28:34,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 04:28:34,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:28:34,571 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 19 treesize of output 1 [2024-11-28 04:28:35,041 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 292 treesize of output 216 [2024-11-28 04:28:35,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 65 [2024-11-28 04:28:36,255 INFO L349 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2024-11-28 04:28:36,255 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 3 case distinctions, treesize of input 188 treesize of output 123 [2024-11-28 04:28:41,170 INFO L349 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2024-11-28 04:28:41,170 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 3 case distinctions, treesize of input 188 treesize of output 123 [2024-11-28 04:28:46,097 INFO L349 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2024-11-28 04:28:46,097 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 3 case distinctions, treesize of input 188 treesize of output 123 [2024-11-28 04:28:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 40 refuted. 4 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-28 04:28:50,221 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:29:11,687 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 547 treesize of output 531 [2024-11-28 04:29:11,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:29:11,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 105103 treesize of output 104183 [2024-11-28 04:29:12,124 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 2865 treesize of output 2761 [2024-11-28 04:29:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-28 04:29:16,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950918838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:29:16,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:29:16,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2024-11-28 04:29:16,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110254848] [2024-11-28 04:29:16,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:29:16,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 04:29:16,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:29:16,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 04:29:16,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1047, Unknown=6, NotChecked=0, Total=1190 [2024-11-28 04:29:16,085 INFO L87 Difference]: Start difference. First operand 192 states and 212 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:29:21,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:29:34,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:29:38,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:29:51,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:29:55,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:30:02,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:30:06,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:30:10,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:30:14,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:30:18,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:30:22,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:30:26,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:30:30,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:30:35,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:30:39,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:30:43,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:30:47,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:30:51,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:30:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:51,385 INFO L93 Difference]: Finished difference Result 217 states and 236 transitions. [2024-11-28 04:30:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:30:51,386 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-28 04:30:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:51,387 INFO L225 Difference]: With dead ends: 217 [2024-11-28 04:30:51,387 INFO L226 Difference]: Without dead ends: 215 [2024-11-28 04:30:51,387 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=289, Invalid=1863, Unknown=10, NotChecked=0, Total=2162 [2024-11-28 04:30:51,388 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 85 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 16 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:51,388 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 235 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 829 Invalid, 18 Unknown, 0 Unchecked, 76.0s Time] [2024-11-28 04:30:51,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-28 04:30:51,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2024-11-28 04:30:51,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0974358974358975) internal successors, (214), 195 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:51,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 214 transitions. [2024-11-28 04:30:51,670 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 214 transitions. Word has length 45 [2024-11-28 04:30:51,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:51,670 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 214 transitions. [2024-11-28 04:30:51,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:51,671 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 214 transitions. [2024-11-28 04:30:51,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 04:30:51,671 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:51,671 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:51,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 04:30:51,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 04:30:51,875 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:51,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:51,876 INFO L85 PathProgramCache]: Analyzing trace with hash 149486108, now seen corresponding path program 15 times [2024-11-28 04:30:51,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:30:51,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837547106] [2024-11-28 04:30:51,876 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:30:51,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:30:51,927 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 04:30:51,927 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:30:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:53,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:30:53,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837547106] [2024-11-28 04:30:53,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837547106] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:30:53,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709502363] [2024-11-28 04:30:53,412 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:30:53,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:53,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:53,414 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:30:53,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 04:30:53,737 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 04:30:53,737 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:30:53,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 04:30:53,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:30:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:54,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:30:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:56,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709502363] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:30:56,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:30:56,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2024-11-28 04:30:56,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600951268] [2024-11-28 04:30:56,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:30:56,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 04:30:56,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:30:56,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 04:30:56,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:30:56,322 INFO L87 Difference]: Start difference. First operand 196 states and 214 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:02,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:02,441 INFO L93 Difference]: Finished difference Result 324 states and 345 transitions. [2024-11-28 04:31:02,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 04:31:02,442 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-28 04:31:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:02,443 INFO L225 Difference]: With dead ends: 324 [2024-11-28 04:31:02,443 INFO L226 Difference]: Without dead ends: 302 [2024-11-28 04:31:02,444 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 65 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=538, Invalid=1912, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 04:31:02,444 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 149 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:02,445 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 421 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-28 04:31:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-11-28 04:31:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 186. [2024-11-28 04:31:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.0702702702702702) internal successors, (198), 185 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 198 transitions. [2024-11-28 04:31:02,684 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 198 transitions. Word has length 47 [2024-11-28 04:31:02,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:02,685 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 198 transitions. [2024-11-28 04:31:02,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 198 transitions. [2024-11-28 04:31:02,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 04:31:02,685 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:02,685 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:02,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 04:31:02,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 04:31:02,886 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:02,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:02,887 INFO L85 PathProgramCache]: Analyzing trace with hash -748715172, now seen corresponding path program 16 times [2024-11-28 04:31:02,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:02,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232660331] [2024-11-28 04:31:02,887 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:31:02,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:02,916 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:31:02,916 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:31:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:31:04,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:04,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232660331] [2024-11-28 04:31:04,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232660331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:31:04,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660508928] [2024-11-28 04:31:04,383 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:31:04,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:04,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:04,389 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:04,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 04:31:04,681 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:31:04,681 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:31:04,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 04:31:04,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:31:06,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:31:07,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660508928] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:31:07,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:31:07,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 30 [2024-11-28 04:31:07,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849494038] [2024-11-28 04:31:07,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:31:07,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 04:31:07,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:07,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 04:31:07,352 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:31:07,352 INFO L87 Difference]: Start difference. First operand 186 states and 198 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:09,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:09,569 INFO L93 Difference]: Finished difference Result 291 states and 304 transitions. [2024-11-28 04:31:09,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:31:09,570 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-28 04:31:09,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:09,571 INFO L225 Difference]: With dead ends: 291 [2024-11-28 04:31:09,571 INFO L226 Difference]: Without dead ends: 269 [2024-11-28 04:31:09,571 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 67 SyntacticMatches, 18 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 04:31:09,571 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 375 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:09,572 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 156 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 04:31:09,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-11-28 04:31:09,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 198. [2024-11-28 04:31:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0659898477157361) internal successors, (210), 197 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 210 transitions. [2024-11-28 04:31:09,825 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 210 transitions. Word has length 47 [2024-11-28 04:31:09,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:09,825 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 210 transitions. [2024-11-28 04:31:09,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:09,826 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 210 transitions. [2024-11-28 04:31:09,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 04:31:09,827 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:09,827 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:09,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 04:31:10,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 04:31:10,028 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:10,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:10,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1171435680, now seen corresponding path program 17 times [2024-11-28 04:31:10,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:10,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053279234] [2024-11-28 04:31:10,029 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:31:10,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:10,106 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-28 04:31:10,106 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:31:10,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785791363] [2024-11-28 04:31:10,108 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:31:10,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:10,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:10,112 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:10,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d643077f-7e6b-4d01-a982-543aeaf94869/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 04:31:10,605 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-28 04:31:10,605 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:31:10,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-28 04:31:10,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:10,690 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 [2024-11-28 04:31:10,803 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 [2024-11-28 04:31:10,925 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 [2024-11-28 04:31:11,075 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 [2024-11-28 04:31:11,207 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 [2024-11-28 04:31:11,383 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 [2024-11-28 04:31:11,523 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 [2024-11-28 04:31:11,685 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 [2024-11-28 04:31:11,850 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 [2024-11-28 04:31:12,011 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 [2024-11-28 04:31:12,519 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 13 treesize of output 9 [2024-11-28 04:31:12,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:31:12,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:31:13,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:31:13,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:31:13,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:31:13,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:31:13,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:31:13,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:31:14,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:31:14,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:31:14,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:31:14,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:31:14,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:31:14,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:31:19,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:31:19,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-28 04:31:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 49 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:31:19,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:51,438 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 70 treesize of output 68 [2024-11-28 04:31:52,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 55851352054 treesize of output 55834574838 [2024-11-28 04:32:03,760 WARN L286 SmtUtils]: Spent 11.00s on a formula simplification. DAG size of input: 59548 DAG size of output: 220 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:32:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 34 proven. 120 refuted. 8 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:32:12,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:32:12,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053279234] [2024-11-28 04:32:12,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:32:12,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785791363] [2024-11-28 04:32:12,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785791363] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:32:12,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:32:12,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 50 [2024-11-28 04:32:12,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009855345] [2024-11-28 04:32:12,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:32:12,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-28 04:32:12,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:32:12,989 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-28 04:32:12,989 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=2138, Unknown=5, NotChecked=0, Total=2450 [2024-11-28 04:32:12,989 INFO L87 Difference]: Start difference. First operand 198 states and 210 transitions. Second operand has 50 states, 50 states have (on average 1.88) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:32:26,357 WARN L286 SmtUtils]: Spent 13.12s on a formula simplification. DAG size of input: 76 DAG size of output: 24 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:33:00,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-28 04:33:05,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-28 04:33:10,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-28 04:33:14,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-28 04:33:18,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-28 04:33:22,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-28 04:33:27,271 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 [1]