./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const_m5.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_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/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_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/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_7cbe31b3-8811-4b74-b113-8204fb13691b/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 1ea5dd3dcdb2ca45816b1054e161d4e883537a3d70de7c4c731596cc44c337d4 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:17:11,715 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:17:11,806 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 23:17:11,815 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:17:11,818 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:17:11,857 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:17:11,858 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:17:11,859 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:17:11,859 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:17:11,860 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:17:11,861 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:17:11,861 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:17:11,861 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:17:11,862 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:17:11,862 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:17:11,862 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:17:11,862 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 23:17:11,863 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:17:11,863 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:17:11,863 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:17:11,863 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:17:11,863 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 23:17:11,863 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:17:11,863 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 23:17:11,864 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:17:11,864 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 23:17:11,864 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:17:11,864 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:17:11,864 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:17:11,864 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:17:11,864 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:17:11,865 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:17:11,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:17:11,865 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:17:11,866 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:17:11,866 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:17:11,866 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:17:11,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:17:11,866 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:17:11,866 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:17:11,866 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 23:17:11,867 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 23:17:11,867 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:17:11,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:17:11,867 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:17:11,867 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:17:11,867 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:17:11,867 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:17:11,867 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_7cbe31b3-8811-4b74-b113-8204fb13691b/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 -> 1ea5dd3dcdb2ca45816b1054e161d4e883537a3d70de7c4c731596cc44c337d4 [2024-11-27 23:17:12,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:17:12,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:17:12,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:17:12,241 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:17:12,242 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:17:12,243 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c [2024-11-27 23:17:15,184 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/data/f7010a826/a68a1a52831a4b63a4ebd7aea30f8331/FLAG8e5e230b5 [2024-11-27 23:17:15,493 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:17:15,494 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c [2024-11-27 23:17:15,504 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/data/f7010a826/a68a1a52831a4b63a4ebd7aea30f8331/FLAG8e5e230b5 [2024-11-27 23:17:15,742 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/data/f7010a826/a68a1a52831a4b63a4ebd7aea30f8331 [2024-11-27 23:17:15,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:17:15,745 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:17:15,747 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:17:15,747 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:17:15,753 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:17:15,754 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:17:15" (1/1) ... [2024-11-27 23:17:15,755 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b70cbf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:15, skipping insertion in model container [2024-11-27 23:17:15,756 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:17:15" (1/1) ... [2024-11-27 23:17:15,778 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:17:15,951 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_7cbe31b3-8811-4b74-b113-8204fb13691b/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c[408,421] [2024-11-27 23:17:15,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:17:15,986 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:17:15,998 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_7cbe31b3-8811-4b74-b113-8204fb13691b/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c[408,421] [2024-11-27 23:17:16,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:17:16,029 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:17:16,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:16 WrapperNode [2024-11-27 23:17:16,030 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:17:16,031 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:17:16,031 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:17:16,031 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:17:16,038 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:16" (1/1) ... [2024-11-27 23:17:16,045 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:16" (1/1) ... [2024-11-27 23:17:16,064 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 138 [2024-11-27 23:17:16,064 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:17:16,065 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:17:16,065 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:17:16,065 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:17:16,073 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:16" (1/1) ... [2024-11-27 23:17:16,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:16" (1/1) ... [2024-11-27 23:17:16,075 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:16" (1/1) ... [2024-11-27 23:17:16,086 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-27 23:17:16,087 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:16" (1/1) ... [2024-11-27 23:17:16,087 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:16" (1/1) ... [2024-11-27 23:17:16,093 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:16" (1/1) ... [2024-11-27 23:17:16,093 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:16" (1/1) ... [2024-11-27 23:17:16,098 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:16" (1/1) ... [2024-11-27 23:17:16,099 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:16" (1/1) ... [2024-11-27 23:17:16,100 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:16" (1/1) ... [2024-11-27 23:17:16,102 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:17:16,103 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:17:16,103 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:17:16,103 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:17:16,104 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:16" (1/1) ... [2024-11-27 23:17:16,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:17:16,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:16,139 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:17:16,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:17:16,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:17:16,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:17:16,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 23:17:16,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 23:17:16,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 23:17:16,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 23:17:16,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:17:16,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:17:16,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 23:17:16,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 23:17:16,267 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:17:16,269 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:17:16,505 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-11-27 23:17:16,507 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:17:16,521 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:17:16,522 INFO L312 CfgBuilder]: Removed 11 assume(true) statements. [2024-11-27 23:17:16,522 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:17:16 BoogieIcfgContainer [2024-11-27 23:17:16,522 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:17:16,525 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:17:16,525 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:17:16,530 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:17:16,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:17:15" (1/3) ... [2024-11-27 23:17:16,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b59b790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:17:16, skipping insertion in model container [2024-11-27 23:17:16,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:16" (2/3) ... [2024-11-27 23:17:16,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b59b790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:17:16, skipping insertion in model container [2024-11-27 23:17:16,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:17:16" (3/3) ... [2024-11-27 23:17:16,535 INFO L128 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m5.c [2024-11-27 23:17:16,551 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:17:16,554 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum_const_m5.c that has 1 procedures, 44 locations, 1 initial locations, 11 loop locations, and 1 error locations. [2024-11-27 23:17:16,611 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:17:16,622 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;@14f73e55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:17:16,623 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 23:17:16,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 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) [2024-11-27 23:17:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-27 23:17:16,633 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:16,633 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:16,634 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:17:16,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:16,638 INFO L85 PathProgramCache]: Analyzing trace with hash -562518598, now seen corresponding path program 1 times [2024-11-27 23:17:16,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:16,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077674986] [2024-11-27 23:17:16,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:16,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:16,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:16,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077674986] [2024-11-27 23:17:16,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077674986] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:16,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:17:16,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:17:16,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746655744] [2024-11-27 23:17:16,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:16,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 23:17:16,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:16,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 23:17:16,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 23:17:16,833 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 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 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2024-11-27 23:17:16,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:16,850 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2024-11-27 23:17:16,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 23:17:16,852 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 [2024-11-27 23:17:16,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:16,859 INFO L225 Difference]: With dead ends: 83 [2024-11-27 23:17:16,859 INFO L226 Difference]: Without dead ends: 39 [2024-11-27 23:17:16,863 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 [2024-11-27 23:17:16,866 INFO L435 NwaCegarLoop]: 55 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, 55 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:16,866 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:17:16,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-27 23:17:16,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-27 23:17:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 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) [2024-11-27 23:17:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2024-11-27 23:17:16,899 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2024-11-27 23:17:16,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:16,899 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2024-11-27 23:17:16,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2024-11-27 23:17:16,900 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2024-11-27 23:17:16,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-27 23:17:16,900 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:16,901 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:16,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:17:16,901 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:17:16,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:16,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2110255686, now seen corresponding path program 1 times [2024-11-27 23:17:16,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:16,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899109384] [2024-11-27 23:17:16,902 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:16,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:17,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:17,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899109384] [2024-11-27 23:17:17,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899109384] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:17,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:17:17,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:17:17,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362031862] [2024-11-27 23:17:17,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:17,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:17:17,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:17,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:17:17,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:17:17,130 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-11-27 23:17:17,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:17,246 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2024-11-27 23:17:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:17:17,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 [2024-11-27 23:17:17,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:17,248 INFO L225 Difference]: With dead ends: 75 [2024-11-27 23:17:17,248 INFO L226 Difference]: Without dead ends: 41 [2024-11-27 23:17:17,249 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:17:17,250 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:17,253 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:17:17,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-27 23:17:17,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2024-11-27 23:17:17,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:17,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2024-11-27 23:17:17,263 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2024-11-27 23:17:17,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:17,263 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2024-11-27 23:17:17,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-11-27 23:17:17,263 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2024-11-27 23:17:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-27 23:17:17,266 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:17,266 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:17,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:17:17,267 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:17:17,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:17,268 INFO L85 PathProgramCache]: Analyzing trace with hash -933107926, now seen corresponding path program 1 times [2024-11-27 23:17:17,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:17,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94983377] [2024-11-27 23:17:17,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:17,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:17:17,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:17,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94983377] [2024-11-27 23:17:17,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94983377] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:17,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:17:17,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:17:17,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605151110] [2024-11-27 23:17:17,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:17,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:17:17,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:17,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:17:17,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:17:17,404 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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) [2024-11-27 23:17:17,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:17,627 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2024-11-27 23:17:17,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:17:17,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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) Word has length 29 [2024-11-27 23:17:17,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:17,629 INFO L225 Difference]: With dead ends: 92 [2024-11-27 23:17:17,629 INFO L226 Difference]: Without dead ends: 61 [2024-11-27 23:17:17,629 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 [2024-11-27 23:17:17,632 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:17,633 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 19 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:17:17,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-27 23:17:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2024-11-27 23:17:17,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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) [2024-11-27 23:17:17,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-11-27 23:17:17,647 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2024-11-27 23:17:17,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:17,648 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-11-27 23:17:17,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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) [2024-11-27 23:17:17,648 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-11-27 23:17:17,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-27 23:17:17,651 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:17,651 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:17,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 23:17:17,651 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:17:17,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:17,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1346168274, now seen corresponding path program 1 times [2024-11-27 23:17:17,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:17,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426906763] [2024-11-27 23:17:17,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:17,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-27 23:17:17,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:17,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426906763] [2024-11-27 23:17:17,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426906763] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:17:17,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482896196] [2024-11-27 23:17:17,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:17,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:17,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:17,899 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:17,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:17:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:17,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 23:17:18,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-27 23:17:18,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:17:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-27 23:17:18,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482896196] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:17:18,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:17:18,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-27 23:17:18,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138201417] [2024-11-27 23:17:18,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:17:18,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:17:18,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:18,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:17:18,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:17:18,135 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-11-27 23:17:18,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:18,384 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2024-11-27 23:17:18,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:17:18,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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 49 [2024-11-27 23:17:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:18,386 INFO L225 Difference]: With dead ends: 97 [2024-11-27 23:17:18,386 INFO L226 Difference]: Without dead ends: 53 [2024-11-27 23:17:18,387 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:17:18,388 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:18,388 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:17:18,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-27 23:17:18,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2024-11-27 23:17:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 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) [2024-11-27 23:17:18,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-11-27 23:17:18,404 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2024-11-27 23:17:18,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:18,404 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-11-27 23:17:18,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-11-27 23:17:18,405 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-11-27 23:17:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-27 23:17:18,406 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:18,406 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:18,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 23:17:18,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:18,611 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:17:18,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:18,611 INFO L85 PathProgramCache]: Analyzing trace with hash 206854070, now seen corresponding path program 2 times [2024-11-27 23:17:18,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:18,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538541211] [2024-11-27 23:17:18,611 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:17:18,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:18,641 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:17:18,641 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:17:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-27 23:17:18,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:18,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538541211] [2024-11-27 23:17:18,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538541211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:17:18,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963169093] [2024-11-27 23:17:18,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:17:18,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:18,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:18,762 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:18,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:17:18,857 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:17:18,857 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:17:18,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 23:17:18,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-27 23:17:18,983 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:17:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-27 23:17:19,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963169093] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:17:19,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:17:19,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-27 23:17:19,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330484743] [2024-11-27 23:17:19,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:17:19,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 23:17:19,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:19,111 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:17:19,111 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:17:19,111 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 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) [2024-11-27 23:17:19,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:19,375 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2024-11-27 23:17:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:17:19,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 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 51 [2024-11-27 23:17:19,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:19,378 INFO L225 Difference]: With dead ends: 123 [2024-11-27 23:17:19,380 INFO L226 Difference]: Without dead ends: 83 [2024-11-27 23:17:19,380 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:17:19,381 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:19,381 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 22 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:17:19,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-27 23:17:19,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2024-11-27 23:17:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 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) [2024-11-27 23:17:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2024-11-27 23:17:19,398 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2024-11-27 23:17:19,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:19,400 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2024-11-27 23:17:19,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 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) [2024-11-27 23:17:19,400 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2024-11-27 23:17:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-27 23:17:19,402 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:19,402 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:19,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 23:17:19,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:19,606 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:17:19,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:19,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1550985310, now seen corresponding path program 3 times [2024-11-27 23:17:19,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:19,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818259740] [2024-11-27 23:17:19,607 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:17:19,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:19,839 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 23:17:19,839 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:17:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:28,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:28,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818259740] [2024-11-27 23:17:28,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818259740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:17:28,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685302841] [2024-11-27 23:17:28,929 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:17:28,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:28,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:28,935 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:28,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:17:29,035 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 23:17:29,036 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:17:29,038 WARN L254 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-27 23:17:29,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:29,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:17:29,188 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 19 treesize of output 18 [2024-11-27 23:17:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:31,634 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:17:35,322 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 49 treesize of output 45 [2024-11-27 23:17:35,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:17:35,346 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 268 treesize of output 236 [2024-11-27 23:17:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:35,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685302841] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:17:35,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:17:35,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 28, 34] total 101 [2024-11-27 23:17:35,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985312248] [2024-11-27 23:17:35,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:17:35,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-27 23:17:35,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:35,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-27 23:17:35,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=9561, Unknown=0, NotChecked=0, Total=10100 [2024-11-27 23:17:35,729 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 101 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 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) [2024-11-27 23:17:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:41,920 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2024-11-27 23:17:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-27 23:17:41,920 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 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 71 [2024-11-27 23:17:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:41,923 INFO L225 Difference]: With dead ends: 143 [2024-11-27 23:17:41,923 INFO L226 Difference]: Without dead ends: 139 [2024-11-27 23:17:41,931 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5022 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=955, Invalid=14297, Unknown=0, NotChecked=0, Total=15252 [2024-11-27 23:17:41,931 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 134 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 5225 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 5452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 5225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:41,932 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 346 Invalid, 5452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 5225 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-27 23:17:41,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-11-27 23:17:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 125. [2024-11-27 23:17:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 124 states have internal predecessors, (144), 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) [2024-11-27 23:17:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2024-11-27 23:17:41,964 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2024-11-27 23:17:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:41,964 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2024-11-27 23:17:41,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 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) [2024-11-27 23:17:41,965 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2024-11-27 23:17:41,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-27 23:17:41,966 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:41,966 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:41,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 23:17:42,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:42,167 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:17:42,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:42,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1369415810, now seen corresponding path program 4 times [2024-11-27 23:17:42,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:42,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113370206] [2024-11-27 23:17:42,168 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:17:42,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:42,197 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:17:42,197 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:17:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-27 23:17:42,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:42,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113370206] [2024-11-27 23:17:42,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113370206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:17:42,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775387438] [2024-11-27 23:17:42,314 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:17:42,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:42,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:42,318 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:42,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:17:42,391 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:17:42,392 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:17:42,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 23:17:42,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-27 23:17:42,471 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:17:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-27 23:17:42,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775387438] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:17:42,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:17:42,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-11-27 23:17:42,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126977483] [2024-11-27 23:17:42,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:17:42,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 23:17:42,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:42,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 23:17:42,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:17:42,541 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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) [2024-11-27 23:17:43,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:43,227 INFO L93 Difference]: Finished difference Result 269 states and 315 transitions. [2024-11-27 23:17:43,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:17:43,228 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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 73 [2024-11-27 23:17:43,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:43,229 INFO L225 Difference]: With dead ends: 269 [2024-11-27 23:17:43,229 INFO L226 Difference]: Without dead ends: 164 [2024-11-27 23:17:43,229 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2024-11-27 23:17:43,230 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 114 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:43,230 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 46 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 23:17:43,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-27 23:17:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 143. [2024-11-27 23:17:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.1408450704225352) internal successors, (162), 142 states have internal predecessors, (162), 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) [2024-11-27 23:17:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 162 transitions. [2024-11-27 23:17:43,260 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 162 transitions. Word has length 73 [2024-11-27 23:17:43,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:43,260 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 162 transitions. [2024-11-27 23:17:43,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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) [2024-11-27 23:17:43,261 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 162 transitions. [2024-11-27 23:17:43,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-27 23:17:43,261 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:43,262 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:43,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 23:17:43,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:43,462 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:17:43,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:43,463 INFO L85 PathProgramCache]: Analyzing trace with hash 82011074, now seen corresponding path program 5 times [2024-11-27 23:17:43,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:43,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55693456] [2024-11-27 23:17:43,463 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:17:43,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:43,496 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-27 23:17:43,496 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:17:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-27 23:17:43,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:43,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55693456] [2024-11-27 23:17:43,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55693456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:17:43,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266692685] [2024-11-27 23:17:43,640 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:17:43,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:43,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:43,642 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:43,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:17:43,779 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-27 23:17:43,779 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:17:43,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 23:17:43,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-27 23:17:43,945 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:17:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-27 23:17:44,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266692685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:17:44,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:17:44,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-11-27 23:17:44,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725382502] [2024-11-27 23:17:44,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:17:44,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 23:17:44,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:44,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 23:17:44,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:17:44,069 INFO L87 Difference]: Start difference. First operand 143 states and 162 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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) [2024-11-27 23:17:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:44,439 INFO L93 Difference]: Finished difference Result 243 states and 272 transitions. [2024-11-27 23:17:44,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 23:17:44,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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 73 [2024-11-27 23:17:44,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:44,441 INFO L225 Difference]: With dead ends: 243 [2024-11-27 23:17:44,441 INFO L226 Difference]: Without dead ends: 105 [2024-11-27 23:17:44,442 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 137 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:17:44,443 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 107 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:44,443 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 44 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:17:44,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-27 23:17:44,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2024-11-27 23:17:44,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 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) [2024-11-27 23:17:44,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2024-11-27 23:17:44,454 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 73 [2024-11-27 23:17:44,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:44,455 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2024-11-27 23:17:44,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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) [2024-11-27 23:17:44,455 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2024-11-27 23:17:44,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-27 23:17:44,456 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:44,456 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:44,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 23:17:44,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:44,660 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:17:44,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:44,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1926596118, now seen corresponding path program 6 times [2024-11-27 23:17:44,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:44,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563352109] [2024-11-27 23:17:44,661 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:17:44,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:44,889 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-27 23:17:44,889 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:17:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:54,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:54,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563352109] [2024-11-27 23:17:54,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563352109] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:17:54,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117201134] [2024-11-27 23:17:54,119 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:17:54,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:54,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:54,121 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:54,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:17:54,272 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-27 23:17:54,273 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:17:54,275 WARN L254 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-27 23:17:54,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:17:57,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:02,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:18:02,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2024-11-27 23:18:02,698 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 23:18:02,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117201134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:02,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:02,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 37, 39] total 122 [2024-11-27 23:18:02,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164736447] [2024-11-27 23:18:02,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:02,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-11-27 23:18:02,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:02,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-11-27 23:18:02,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=14222, Unknown=0, NotChecked=0, Total=14762 [2024-11-27 23:18:02,706 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 122 states, 122 states have (on average 2.1475409836065573) internal successors, (262), 122 states have internal predecessors, (262), 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) [2024-11-27 23:18:16,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:16,834 INFO L93 Difference]: Finished difference Result 201 states and 229 transitions. [2024-11-27 23:18:16,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-27 23:18:16,834 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.1475409836065573) internal successors, (262), 122 states have internal predecessors, (262), 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 93 [2024-11-27 23:18:16,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:16,836 INFO L225 Difference]: With dead ends: 201 [2024-11-27 23:18:16,836 INFO L226 Difference]: Without dead ends: 197 [2024-11-27 23:18:16,840 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7966 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=1438, Invalid=29012, Unknown=0, NotChecked=0, Total=30450 [2024-11-27 23:18:16,841 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 255 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 7818 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 8223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 7818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:16,841 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 391 Invalid, 8223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 7818 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2024-11-27 23:18:16,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-27 23:18:16,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 163. [2024-11-27 23:18:16,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.123456790123457) internal successors, (182), 162 states have internal predecessors, (182), 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) [2024-11-27 23:18:16,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 182 transitions. [2024-11-27 23:18:16,866 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 182 transitions. Word has length 93 [2024-11-27 23:18:16,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:16,867 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 182 transitions. [2024-11-27 23:18:16,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.1475409836065573) internal successors, (262), 122 states have internal predecessors, (262), 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) [2024-11-27 23:18:16,867 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 182 transitions. [2024-11-27 23:18:16,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-27 23:18:16,869 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:16,869 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:18:16,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 23:18:17,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:17,070 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:18:17,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash -980627698, now seen corresponding path program 7 times [2024-11-27 23:18:17,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:17,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409431863] [2024-11-27 23:18:17,071 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:18:17,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-27 23:18:17,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:17,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409431863] [2024-11-27 23:18:17,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409431863] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:17,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308586949] [2024-11-27 23:18:17,260 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:18:17,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:17,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:17,262 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:17,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 23:18:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:17,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:18:17,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-27 23:18:17,462 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-27 23:18:17,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308586949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:17,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:17,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-27 23:18:17,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089317999] [2024-11-27 23:18:17,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:17,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 23:18:17,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:17,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 23:18:17,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-27 23:18:17,555 INFO L87 Difference]: Start difference. First operand 163 states and 182 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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) [2024-11-27 23:18:18,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:18,229 INFO L93 Difference]: Finished difference Result 353 states and 399 transitions. [2024-11-27 23:18:18,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:18:18,230 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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 95 [2024-11-27 23:18:18,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:18,231 INFO L225 Difference]: With dead ends: 353 [2024-11-27 23:18:18,231 INFO L226 Difference]: Without dead ends: 195 [2024-11-27 23:18:18,231 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 177 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-11-27 23:18:18,232 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 278 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:18,232 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 45 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 23:18:18,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-27 23:18:18,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 178. [2024-11-27 23:18:18,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.1073446327683616) internal successors, (196), 177 states have internal predecessors, (196), 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) [2024-11-27 23:18:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 196 transitions. [2024-11-27 23:18:18,252 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 196 transitions. Word has length 95 [2024-11-27 23:18:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:18,253 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 196 transitions. [2024-11-27 23:18:18,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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) [2024-11-27 23:18:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 196 transitions. [2024-11-27 23:18:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-27 23:18:18,254 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:18,254 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:18:18,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 23:18:18,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 23:18:18,455 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:18:18,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:18,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2098237938, now seen corresponding path program 8 times [2024-11-27 23:18:18,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:18,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266807988] [2024-11-27 23:18:18,456 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:18:18,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:18,475 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:18:18,475 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-27 23:18:18,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:18,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266807988] [2024-11-27 23:18:18,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266807988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:18,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105463935] [2024-11-27 23:18:18,636 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:18:18,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:18,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:18,639 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:18,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 23:18:18,737 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:18:18,738 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:18,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:18:18,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-27 23:18:18,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-27 23:18:19,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105463935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:19,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:19,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-27 23:18:19,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663062128] [2024-11-27 23:18:19,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:19,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 23:18:19,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:19,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 23:18:19,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-27 23:18:19,002 INFO L87 Difference]: Start difference. First operand 178 states and 196 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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) [2024-11-27 23:18:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:19,657 INFO L93 Difference]: Finished difference Result 194 states and 212 transitions. [2024-11-27 23:18:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:18:19,658 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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 97 [2024-11-27 23:18:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:19,658 INFO L225 Difference]: With dead ends: 194 [2024-11-27 23:18:19,659 INFO L226 Difference]: Without dead ends: 126 [2024-11-27 23:18:19,659 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 180 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2024-11-27 23:18:19,659 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 209 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:19,660 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 32 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 23:18:19,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-27 23:18:19,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2024-11-27 23:18:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 115 states have internal predecessors, (126), 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) [2024-11-27 23:18:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2024-11-27 23:18:19,676 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 97 [2024-11-27 23:18:19,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:19,676 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2024-11-27 23:18:19,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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) [2024-11-27 23:18:19,676 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2024-11-27 23:18:19,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-27 23:18:19,679 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:19,679 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:18:19,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 23:18:19,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-27 23:18:19,883 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:18:19,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:19,883 INFO L85 PathProgramCache]: Analyzing trace with hash 546871926, now seen corresponding path program 9 times [2024-11-27 23:18:19,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:19,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194656338] [2024-11-27 23:18:19,884 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:18:19,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:20,019 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-27 23:18:20,020 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:18:33,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:33,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194656338] [2024-11-27 23:18:33,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194656338] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:33,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580203265] [2024-11-27 23:18:33,939 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:18:33,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:33,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:33,941 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:33,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 23:18:34,052 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-27 23:18:34,052 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:34,055 WARN L254 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 190 conjuncts are in the unsatisfiable core [2024-11-27 23:18:34,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:34,249 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 [2024-11-27 23:18:45,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:18:45,580 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:18:45,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 36 [2024-11-27 23:18:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 7 proven. 160 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 23:18:45,912 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:19:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:19:01,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580203265] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:19:01,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:19:01,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 71, 71] total 207 [2024-11-27 23:19:01,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682395613] [2024-11-27 23:19:01,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:19:01,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2024-11-27 23:19:01,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:01,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2024-11-27 23:19:01,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2207, Invalid=40435, Unknown=0, NotChecked=0, Total=42642 [2024-11-27 23:19:01,778 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 207 states, 207 states have (on average 1.5893719806763285) internal successors, (329), 207 states have internal predecessors, (329), 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) [2024-11-27 23:20:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:20:02,485 INFO L93 Difference]: Finished difference Result 251 states and 278 transitions. [2024-11-27 23:20:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2024-11-27 23:20:02,486 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 1.5893719806763285) internal successors, (329), 207 states have internal predecessors, (329), 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 115 [2024-11-27 23:20:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:20:02,489 INFO L225 Difference]: With dead ends: 251 [2024-11-27 23:20:02,489 INFO L226 Difference]: Without dead ends: 246 [2024-11-27 23:20:02,494 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 334 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29752 ImplicationChecksByTransitivity, 77.0s TimeCoverageRelationStatistics Valid=7039, Invalid=105521, Unknown=0, NotChecked=0, Total=112560 [2024-11-27 23:20:02,495 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 525 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 14728 mSolverCounterSat, 1080 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 15808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1080 IncrementalHoareTripleChecker+Valid, 14728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:20:02,495 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 536 Invalid, 15808 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1080 Valid, 14728 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2024-11-27 23:20:02,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-11-27 23:20:02,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 203. [2024-11-27 23:20:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.099009900990099) internal successors, (222), 202 states have internal predecessors, (222), 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) [2024-11-27 23:20:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 222 transitions. [2024-11-27 23:20:02,538 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 222 transitions. Word has length 115 [2024-11-27 23:20:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:20:02,538 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 222 transitions. [2024-11-27 23:20:02,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 1.5893719806763285) internal successors, (329), 207 states have internal predecessors, (329), 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) [2024-11-27 23:20:02,539 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 222 transitions. [2024-11-27 23:20:02,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-27 23:20:02,540 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:20:02,540 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:20:02,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 23:20:02,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:20:02,741 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:20:02,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:20:02,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1766585190, now seen corresponding path program 10 times [2024-11-27 23:20:02,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:20:02,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636342324] [2024-11-27 23:20:02,742 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:20:02,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:20:02,757 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:20:02,757 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:20:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-27 23:20:02,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:20:02,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636342324] [2024-11-27 23:20:02,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636342324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:20:02,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472189225] [2024-11-27 23:20:02,950 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:20:02,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:20:02,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:20:02,954 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:20:02,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 23:20:03,052 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:20:03,052 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:20:03,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 23:20:03,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:20:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-27 23:20:03,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:20:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-27 23:20:03,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472189225] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:20:03,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:20:03,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2024-11-27 23:20:03,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85819061] [2024-11-27 23:20:03,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:20:03,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 23:20:03,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:20:03,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 23:20:03,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:20:03,295 INFO L87 Difference]: Start difference. First operand 203 states and 222 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 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) [2024-11-27 23:20:04,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:20:04,398 INFO L93 Difference]: Finished difference Result 421 states and 467 transitions. [2024-11-27 23:20:04,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-27 23:20:04,399 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 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 117 [2024-11-27 23:20:04,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:20:04,400 INFO L225 Difference]: With dead ends: 421 [2024-11-27 23:20:04,400 INFO L226 Difference]: Without dead ends: 250 [2024-11-27 23:20:04,401 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 223 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2024-11-27 23:20:04,401 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 273 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:20:04,402 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 53 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-27 23:20:04,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-27 23:20:04,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 231. [2024-11-27 23:20:04,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.0913043478260869) internal successors, (251), 230 states have internal predecessors, (251), 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) [2024-11-27 23:20:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 251 transitions. [2024-11-27 23:20:04,449 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 251 transitions. Word has length 117 [2024-11-27 23:20:04,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:20:04,449 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 251 transitions. [2024-11-27 23:20:04,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 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) [2024-11-27 23:20:04,449 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 251 transitions. [2024-11-27 23:20:04,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-27 23:20:04,451 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:20:04,451 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:20:04,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 23:20:04,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:20:04,652 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:20:04,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:20:04,652 INFO L85 PathProgramCache]: Analyzing trace with hash -38849794, now seen corresponding path program 11 times [2024-11-27 23:20:04,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:20:04,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606817931] [2024-11-27 23:20:04,653 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:20:04,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:20:04,721 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-27 23:20:04,722 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:20:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-27 23:20:04,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:20:04,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606817931] [2024-11-27 23:20:04,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606817931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:20:04,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511394484] [2024-11-27 23:20:04,916 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:20:04,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:20:04,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:20:04,918 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:20:04,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 23:20:05,212 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-27 23:20:05,213 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:20:05,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 23:20:05,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:20:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-27 23:20:05,362 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:20:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-27 23:20:05,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511394484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:20:05,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:20:05,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2024-11-27 23:20:05,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959667113] [2024-11-27 23:20:05,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:20:05,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 23:20:05,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:20:05,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 23:20:05,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:20:05,495 INFO L87 Difference]: Start difference. First operand 231 states and 251 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 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) [2024-11-27 23:20:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:20:06,101 INFO L93 Difference]: Finished difference Result 363 states and 392 transitions. [2024-11-27 23:20:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:20:06,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 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 119 [2024-11-27 23:20:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:20:06,103 INFO L225 Difference]: With dead ends: 363 [2024-11-27 23:20:06,103 INFO L226 Difference]: Without dead ends: 149 [2024-11-27 23:20:06,104 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 228 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2024-11-27 23:20:06,104 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 333 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:20:06,105 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 43 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 23:20:06,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-27 23:20:06,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 138. [2024-11-27 23:20:06,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 states have internal predecessors, (148), 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) [2024-11-27 23:20:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2024-11-27 23:20:06,133 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 119 [2024-11-27 23:20:06,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:20:06,133 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2024-11-27 23:20:06,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 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) [2024-11-27 23:20:06,133 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2024-11-27 23:20:06,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-27 23:20:06,134 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:20:06,134 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:20:06,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 23:20:06,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 23:20:06,334 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:20:06,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:20:06,335 INFO L85 PathProgramCache]: Analyzing trace with hash -195081726, now seen corresponding path program 12 times [2024-11-27 23:20:06,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:20:06,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294439931] [2024-11-27 23:20:06,335 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:20:06,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:20:06,473 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-27 23:20:06,473 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:20:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:20:24,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:20:24,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294439931] [2024-11-27 23:20:24,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294439931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:20:24,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158188460] [2024-11-27 23:20:24,097 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:20:24,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:20:24,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:20:24,101 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:20:24,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbe31b3-8811-4b74-b113-8204fb13691b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 23:20:24,314 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-27 23:20:24,314 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:20:24,321 WARN L254 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 226 conjuncts are in the unsatisfiable core [2024-11-27 23:20:24,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:20:24,573 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 [2024-11-27 23:20:59,986 INFO L349 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2024-11-27 23:20:59,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 56 [2024-11-27 23:21:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 9 proven. 250 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 23:21:00,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:22:06,866 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 31 [2024-11-27 23:22:06,885 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:22:06,885 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 72 treesize of output 52 [2024-11-27 23:22:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 251 refuted. 8 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 23:22:07,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158188460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:22:07,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:22:07,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 80, 81] total 244 [2024-11-27 23:22:07,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561401176] [2024-11-27 23:22:07,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:22:07,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 244 states [2024-11-27 23:22:07,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:07,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 244 interpolants. [2024-11-27 23:22:07,411 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2815, Invalid=56466, Unknown=11, NotChecked=0, Total=59292 [2024-11-27 23:22:07,412 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 244 states, 244 states have (on average 1.598360655737705) internal successors, (390), 244 states have internal predecessors, (390), 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) [2024-11-27 23:24:06,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:24:10,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:24:16,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:24:20,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:24:30,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:24:34,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:24:38,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.72s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:24:46,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.71s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:24:48,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:25:01,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.55s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:25:05,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:25:25,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:25:29,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:26:04,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:26:08,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:26:12,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.81s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:26:15,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:26:19,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:26:24,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:26:37,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-27 23:27:35,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.81s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:27:44,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:27:48,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:27:55,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.98s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:28:09,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:28:22,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:28:27,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:28:31,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:28:35,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:28:44,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:28:48,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:28:52,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:28:57,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:29:01,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:29:07,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:29:11,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:29:16,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:29:19,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:29:23,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:29:27,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:29:57,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:30:03,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:30:10,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:30:17,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:30:23,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:30:27,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:30:36,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:30:40,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:30:46,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:30:50,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:30:54,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:30:58,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:31:03,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:31:06,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:31:10,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:31:35,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:31:40,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]