./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/xor5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/xor5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd --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 a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 13:23:41,855 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 13:23:41,937 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 13:23:41,943 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 13:23:41,944 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 13:23:41,974 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 13:23:41,974 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 13:23:41,975 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 13:23:41,975 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 13:23:41,975 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 13:23:41,976 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 13:23:41,976 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 13:23:41,976 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 13:23:41,976 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 13:23:41,977 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 13:23:41,977 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 13:23:41,977 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 13:23:41,977 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 13:23:41,977 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 13:23:41,977 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 13:23:41,977 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 13:23:41,978 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 13:23:41,978 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 13:23:41,978 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 13:23:41,978 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 13:23:41,979 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 13:23:41,979 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 13:23:41,979 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 13:23:41,979 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 13:23:41,979 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 13:23:41,980 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 13:23:41,980 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 13:23:41,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:23:41,980 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 13:23:41,981 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 13:23:41,981 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 13:23:41,981 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 13:23:41,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 13:23:41,981 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 13:23:41,982 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 13:23:41,982 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 13:23:41,982 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 13:23:41,982 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_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd 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 -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2024-11-13 13:23:42,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 13:23:42,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 13:23:42,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 13:23:42,409 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 13:23:42,409 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 13:23:42,413 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/array-crafted/xor5.i Unable to find full path for "g++" [2024-11-13 13:23:44,832 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 13:23:45,179 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 13:23:45,180 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/sv-benchmarks/c/array-crafted/xor5.i [2024-11-13 13:23:45,190 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/data/c1829a1a4/b62dca367d2e43e38f3bd1e1c984b16d/FLAG107370505 [2024-11-13 13:23:45,217 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/data/c1829a1a4/b62dca367d2e43e38f3bd1e1c984b16d [2024-11-13 13:23:45,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 13:23:45,225 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 13:23:45,227 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 13:23:45,229 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 13:23:45,235 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 13:23:45,236 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:23:45" (1/1) ... [2024-11-13 13:23:45,237 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@482cfb84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:23:45, skipping insertion in model container [2024-11-13 13:23:45,240 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:23:45" (1/1) ... [2024-11-13 13:23:45,263 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 13:23:45,535 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_d942fe7e-5789-4c3e-a589-39c42f66a498/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2024-11-13 13:23:45,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:23:45,557 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 13:23:45,595 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_d942fe7e-5789-4c3e-a589-39c42f66a498/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2024-11-13 13:23:45,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:23:45,633 INFO L204 MainTranslator]: Completed translation [2024-11-13 13:23:45,633 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:23:45 WrapperNode [2024-11-13 13:23:45,634 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 13:23:45,636 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 13:23:45,636 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 13:23:45,636 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 13:23:45,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:23:45" (1/1) ... [2024-11-13 13:23:45,655 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:23:45" (1/1) ... [2024-11-13 13:23:45,677 INFO L138 Inliner]: procedures = 16, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2024-11-13 13:23:45,678 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 13:23:45,678 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 13:23:45,678 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 13:23:45,679 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 13:23:45,690 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:23:45" (1/1) ... [2024-11-13 13:23:45,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:23:45" (1/1) ... [2024-11-13 13:23:45,693 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:23:45" (1/1) ... [2024-11-13 13:23:45,710 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 7, 11]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 5 writes are split as follows [0, 0, 5]. [2024-11-13 13:23:45,711 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:23:45" (1/1) ... [2024-11-13 13:23:45,711 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:23:45" (1/1) ... [2024-11-13 13:23:45,723 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:23:45" (1/1) ... [2024-11-13 13:23:45,736 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:23:45" (1/1) ... [2024-11-13 13:23:45,738 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:23:45" (1/1) ... [2024-11-13 13:23:45,743 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:23:45" (1/1) ... [2024-11-13 13:23:45,745 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 13:23:45,750 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 13:23:45,751 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 13:23:45,751 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 13:23:45,752 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:23:45" (1/1) ... [2024-11-13 13:23:45,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:23:45,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:23:45,799 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 13:23:45,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 13:23:45,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 13:23:45,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 13:23:45,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 13:23:45,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-13 13:23:45,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 13:23:45,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 13:23:45,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 13:23:45,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-13 13:23:45,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 13:23:45,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 13:23:45,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 13:23:45,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 13:23:45,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-13 13:23:45,848 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2024-11-13 13:23:45,848 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2024-11-13 13:23:45,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 13:23:45,987 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 13:23:45,989 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 13:23:46,358 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2024-11-13 13:23:46,358 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 13:23:46,379 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 13:23:46,379 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 13:23:46,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:23:46 BoogieIcfgContainer [2024-11-13 13:23:46,380 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 13:23:46,385 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 13:23:46,385 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 13:23:46,392 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 13:23:46,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:23:45" (1/3) ... [2024-11-13 13:23:46,393 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b24574a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:23:46, skipping insertion in model container [2024-11-13 13:23:46,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:23:45" (2/3) ... [2024-11-13 13:23:46,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b24574a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:23:46, skipping insertion in model container [2024-11-13 13:23:46,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:23:46" (3/3) ... [2024-11-13 13:23:46,397 INFO L112 eAbstractionObserver]: Analyzing ICFG xor5.i [2024-11-13 13:23:46,419 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 13:23:46,422 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG xor5.i that has 2 procedures, 31 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 13:23:46,510 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 13:23:46,533 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;@7a5525cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 13:23:46,534 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 13:23:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 13:23:46,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 13:23:46,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:23:46,553 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:23:46,553 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:23:46,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:23:46,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1042826608, now seen corresponding path program 1 times [2024-11-13 13:23:46,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:23:46,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145614143] [2024-11-13 13:23:46,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:23:46,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:23:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:46,974 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 13:23:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:47,007 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 13:23:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:47,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 13:23:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 13:23:47,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:23:47,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145614143] [2024-11-13 13:23:47,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145614143] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:23:47,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:23:47,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:23:47,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061205003] [2024-11-13 13:23:47,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:23:47,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:23:47,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:23:47,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:23:47,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:23:47,081 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 13:23:47,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:23:47,172 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2024-11-13 13:23:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:23:47,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2024-11-13 13:23:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:23:47,182 INFO L225 Difference]: With dead ends: 59 [2024-11-13 13:23:47,182 INFO L226 Difference]: Without dead ends: 27 [2024-11-13 13:23:47,186 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:23:47,189 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 13:23:47,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 13:23:47,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-13 13:23:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-13 13:23:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 13:23:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-13 13:23:47,237 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 30 [2024-11-13 13:23:47,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:23:47,238 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-13 13:23:47,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 13:23:47,241 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-13 13:23:47,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 13:23:47,244 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:23:47,244 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:23:47,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 13:23:47,245 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:23:47,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:23:47,249 INFO L85 PathProgramCache]: Analyzing trace with hash -363127407, now seen corresponding path program 1 times [2024-11-13 13:23:47,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:23:47,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056405055] [2024-11-13 13:23:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:23:47,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:23:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:47,532 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-13 13:23:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:47,601 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 13:23:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:47,622 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-13 13:23:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 13:23:47,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:23:47,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056405055] [2024-11-13 13:23:47,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056405055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:23:47,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152671571] [2024-11-13 13:23:47,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:23:47,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:23:47,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:23:47,652 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:23:47,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 13:23:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:47,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 13:23:47,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:23:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 13:23:47,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:23:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 13:23:48,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152671571] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:23:48,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:23:48,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-13 13:23:48,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845042722] [2024-11-13 13:23:48,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:23:48,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 13:23:48,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:23:48,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 13:23:48,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-13 13:23:48,050 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-13 13:23:48,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:23:48,264 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2024-11-13 13:23:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 13:23:48,265 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 31 [2024-11-13 13:23:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:23:48,266 INFO L225 Difference]: With dead ends: 56 [2024-11-13 13:23:48,268 INFO L226 Difference]: Without dead ends: 34 [2024-11-13 13:23:48,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:23:48,270 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 13:23:48,272 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 125 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 13:23:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-13 13:23:48,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2024-11-13 13:23:48,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 13:23:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-13 13:23:48,285 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 31 [2024-11-13 13:23:48,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:23:48,286 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-13 13:23:48,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-13 13:23:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-13 13:23:48,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 13:23:48,293 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:23:48,293 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:23:48,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-13 13:23:48,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:23:48,494 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:23:48,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:23:48,495 INFO L85 PathProgramCache]: Analyzing trace with hash -567792161, now seen corresponding path program 1 times [2024-11-13 13:23:48,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:23:48,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254091373] [2024-11-13 13:23:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:23:48,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:23:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:48,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 13:23:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:48,771 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-13 13:23:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:48,815 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-13 13:23:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 13:23:48,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:23:48,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254091373] [2024-11-13 13:23:48,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254091373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:23:48,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280696256] [2024-11-13 13:23:48,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:23:48,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:23:48,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:23:48,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:23:48,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 13:23:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:48,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 13:23:48,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:23:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 13:23:49,072 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:23:49,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280696256] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:23:49,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 13:23:49,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2024-11-13 13:23:49,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868365048] [2024-11-13 13:23:49,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:23:49,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:23:49,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:23:49,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:23:49,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-13 13:23:49,075 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 13:23:49,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:23:49,158 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2024-11-13 13:23:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:23:49,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-11-13 13:23:49,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:23:49,161 INFO L225 Difference]: With dead ends: 47 [2024-11-13 13:23:49,161 INFO L226 Difference]: Without dead ends: 30 [2024-11-13 13:23:49,162 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-13 13:23:49,163 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 13:23:49,163 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 42 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 13:23:49,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-13 13:23:49,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-13 13:23:49,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 13:23:49,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-11-13 13:23:49,178 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 41 [2024-11-13 13:23:49,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:23:49,180 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-11-13 13:23:49,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 13:23:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-11-13 13:23:49,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 13:23:49,183 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:23:49,184 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:23:49,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 13:23:49,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:23:49,385 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:23:49,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:23:49,385 INFO L85 PathProgramCache]: Analyzing trace with hash 407054456, now seen corresponding path program 1 times [2024-11-13 13:23:49,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:23:49,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516519367] [2024-11-13 13:23:49,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:23:49,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:23:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:53,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 13:23:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:54,063 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-13 13:23:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:54,633 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-13 13:23:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 13:23:55,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:23:55,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516519367] [2024-11-13 13:23:55,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516519367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:23:55,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422961794] [2024-11-13 13:23:55,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:23:55,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:23:55,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:23:55,138 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:23:55,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 13:23:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:23:55,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-13 13:23:55,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:23:55,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 13:23:56,372 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 64 treesize of output 33 [2024-11-13 13:23:57,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:23:57,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 43 [2024-11-13 13:23:57,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:23:57,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 43 [2024-11-13 13:23:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:23:59,159 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:24:03,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422961794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:24:03,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:24:03,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 52 [2024-11-13 13:24:03,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242720547] [2024-11-13 13:24:03,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:24:03,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-13 13:24:03,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:24:03,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-13 13:24:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=4374, Unknown=0, NotChecked=0, Total=4692 [2024-11-13 13:24:03,756 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 52 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 44 states have internal predecessors, (62), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 13:24:07,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:24:07,947 INFO L93 Difference]: Finished difference Result 155 states and 216 transitions. [2024-11-13 13:24:07,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-13 13:24:07,948 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 44 states have internal predecessors, (62), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2024-11-13 13:24:07,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:24:07,953 INFO L225 Difference]: With dead ends: 155 [2024-11-13 13:24:07,953 INFO L226 Difference]: Without dead ends: 151 [2024-11-13 13:24:07,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=680, Invalid=8062, Unknown=0, NotChecked=0, Total=8742 [2024-11-13 13:24:07,959 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 212 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1978 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-13 13:24:07,960 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 315 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1978 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-13 13:24:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-13 13:24:07,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 85. [2024-11-13 13:24:07,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 71 states have (on average 1.352112676056338) internal successors, (96), 74 states have internal predecessors, (96), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-13 13:24:07,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 116 transitions. [2024-11-13 13:24:07,984 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 116 transitions. Word has length 42 [2024-11-13 13:24:07,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:24:07,984 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 116 transitions. [2024-11-13 13:24:07,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 44 states have internal predecessors, (62), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 13:24:07,985 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 116 transitions. [2024-11-13 13:24:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 13:24:07,987 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:24:07,987 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:24:08,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 13:24:08,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:24:08,188 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:24:08,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:24:08,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1351866836, now seen corresponding path program 1 times [2024-11-13 13:24:08,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:24:08,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413911903] [2024-11-13 13:24:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:24:08,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:24:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:24:09,023 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 13:24:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:24:09,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 13:24:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:24:09,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-13 13:24:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:24:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 13:24:09,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:24:09,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413911903] [2024-11-13 13:24:09,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413911903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:24:09,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309544139] [2024-11-13 13:24:09,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:24:09,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:24:09,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:24:09,259 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:24:09,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 13:24:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:24:09,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-13 13:24:09,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:24:09,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:24:09,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2024-11-13 13:24:09,810 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 24 treesize of output 19 [2024-11-13 13:24:09,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:24:09,907 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-11-13 13:24:09,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 26 [2024-11-13 13:24:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 13:24:10,103 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:24:22,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309544139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:24:22,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:24:22,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2024-11-13 13:24:22,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390509351] [2024-11-13 13:24:22,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:24:22,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 13:24:22,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:24:22,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 13:24:22,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=847, Unknown=3, NotChecked=0, Total=992 [2024-11-13 13:24:22,455 INFO L87 Difference]: Start difference. First operand 85 states and 116 transitions. Second operand has 26 states, 25 states have (on average 2.64) internal successors, (66), 23 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 13:24:26,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:24:30,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:24:34,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:24:38,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:24:42,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:24:46,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:24:50,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:24:54,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:24:58,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:25:02,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:25:06,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:25:10,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:25:14,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:25:18,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:25:22,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:25:29,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:25:33,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:25:37,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:25:41,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:25:45,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:25:49,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:25:53,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:25:57,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:25:58,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:26:02,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:26:08,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:26:12,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:26:12,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:26:12,632 INFO L93 Difference]: Finished difference Result 272 states and 376 transitions. [2024-11-13 13:26:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-13 13:26:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.64) internal successors, (66), 23 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 43 [2024-11-13 13:26:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:26:12,637 INFO L225 Difference]: With dead ends: 272 [2024-11-13 13:26:12,637 INFO L226 Difference]: Without dead ends: 243 [2024-11-13 13:26:12,638 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=304, Invalid=1763, Unknown=3, NotChecked=0, Total=2070 [2024-11-13 13:26:12,639 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 176 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 42 mSolverCounterUnsat, 31 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 109.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 31 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 109.6s IncrementalHoareTripleChecker+Time [2024-11-13 13:26:12,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 387 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 596 Invalid, 31 Unknown, 0 Unchecked, 109.6s Time] [2024-11-13 13:26:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-11-13 13:26:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 151. [2024-11-13 13:26:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 129 states have (on average 1.37984496124031) internal successors, (178), 133 states have internal predecessors, (178), 11 states have call successors, (11), 6 states have call predecessors, (11), 10 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2024-11-13 13:26:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 210 transitions. [2024-11-13 13:26:12,682 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 210 transitions. Word has length 43 [2024-11-13 13:26:12,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:26:12,683 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 210 transitions. [2024-11-13 13:26:12,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.64) internal successors, (66), 23 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 13:26:12,683 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 210 transitions. [2024-11-13 13:26:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 13:26:12,686 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:26:12,686 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:26:12,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 13:26:12,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:26:12,890 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:26:12,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:26:12,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1732058748, now seen corresponding path program 2 times [2024-11-13 13:26:12,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:26:12,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62043291] [2024-11-13 13:26:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:26:12,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:26:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:16,054 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 13:26:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:16,540 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-13 13:26:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:17,012 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-13 13:26:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 13:26:17,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:26:17,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62043291] [2024-11-13 13:26:17,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62043291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:26:17,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611788403] [2024-11-13 13:26:17,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:26:17,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:26:17,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:26:17,433 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:26:17,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 13:26:17,576 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:26:17,576 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:26:17,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-13 13:26:17,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:26:17,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 13:26:18,512 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 64 treesize of output 33 [2024-11-13 13:26:19,322 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 90 treesize of output 54 [2024-11-13 13:26:19,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 13:26:20,282 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 114 treesize of output 70 [2024-11-13 13:26:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 13:26:20,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:26:21,198 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 45 treesize of output 41 [2024-11-13 13:26:21,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2024-11-13 13:26:21,239 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 43 treesize of output 39 [2024-11-13 13:26:21,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2024-11-13 13:26:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 13:26:23,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611788403] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:26:23,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:26:23,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27, 26] total 69 [2024-11-13 13:26:23,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061740735] [2024-11-13 13:26:23,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:26:23,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-13 13:26:23,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:26:23,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-13 13:26:23,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=4375, Unknown=0, NotChecked=0, Total=4692 [2024-11-13 13:26:23,457 INFO L87 Difference]: Start difference. First operand 151 states and 210 transitions. Second operand has 69 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 61 states have internal predecessors, (96), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-13 13:26:30,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:26:30,799 INFO L93 Difference]: Finished difference Result 504 states and 726 transitions. [2024-11-13 13:26:30,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-13 13:26:30,800 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 61 states have internal predecessors, (96), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) Word has length 43 [2024-11-13 13:26:30,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:26:30,808 INFO L225 Difference]: With dead ends: 504 [2024-11-13 13:26:30,809 INFO L226 Difference]: Without dead ends: 397 [2024-11-13 13:26:30,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=846, Invalid=11586, Unknown=0, NotChecked=0, Total=12432 [2024-11-13 13:26:30,815 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 392 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-13 13:26:30,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 550 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2109 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-13 13:26:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-11-13 13:26:30,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 189. [2024-11-13 13:26:30,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 163 states have (on average 1.3865030674846626) internal successors, (226), 169 states have internal predecessors, (226), 13 states have call successors, (13), 7 states have call predecessors, (13), 12 states have return successors, (26), 12 states have call predecessors, (26), 13 states have call successors, (26) [2024-11-13 13:26:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 265 transitions. [2024-11-13 13:26:30,885 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 265 transitions. Word has length 43 [2024-11-13 13:26:30,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:26:30,886 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 265 transitions. [2024-11-13 13:26:30,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 61 states have internal predecessors, (96), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-13 13:26:30,886 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 265 transitions. [2024-11-13 13:26:30,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 13:26:30,892 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:26:30,892 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:26:30,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 13:26:31,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:26:31,097 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:26:31,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:26:31,098 INFO L85 PathProgramCache]: Analyzing trace with hash 874086714, now seen corresponding path program 3 times [2024-11-13 13:26:31,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:26:31,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377548000] [2024-11-13 13:26:31,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:26:31,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:26:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:31,606 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 13:26:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:31,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-13 13:26:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:31,755 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-13 13:26:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 13:26:31,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:26:31,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377548000] [2024-11-13 13:26:31,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377548000] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:26:31,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348946197] [2024-11-13 13:26:31,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:26:31,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:26:31,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:26:31,833 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:26:31,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 13:26:31,968 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-13 13:26:31,968 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:26:31,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-13 13:26:31,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:26:32,137 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:26:32,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-13 13:26:32,342 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 [2024-11-13 13:26:32,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:26:32,436 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-11-13 13:26:32,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2024-11-13 13:26:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 13:26:32,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:26:33,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348946197] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:26:33,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:26:33,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2024-11-13 13:26:33,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933276395] [2024-11-13 13:26:33,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:26:33,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 13:26:33,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:26:33,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 13:26:33,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2024-11-13 13:26:33,022 INFO L87 Difference]: Start difference. First operand 189 states and 265 transitions. Second operand has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 18 states have internal predecessors, (60), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 13:26:34,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:26:34,369 INFO L93 Difference]: Finished difference Result 460 states and 642 transitions. [2024-11-13 13:26:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 13:26:34,370 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 18 states have internal predecessors, (60), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2024-11-13 13:26:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:26:34,374 INFO L225 Difference]: With dead ends: 460 [2024-11-13 13:26:34,374 INFO L226 Difference]: Without dead ends: 412 [2024-11-13 13:26:34,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 13:26:34,376 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 108 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 13:26:34,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 450 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 13:26:34,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2024-11-13 13:26:34,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 299. [2024-11-13 13:26:34,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 262 states have (on average 1.4122137404580153) internal successors, (370), 273 states have internal predecessors, (370), 17 states have call successors, (17), 13 states have call predecessors, (17), 19 states have return successors, (27), 12 states have call predecessors, (27), 17 states have call successors, (27) [2024-11-13 13:26:34,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 414 transitions. [2024-11-13 13:26:34,448 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 414 transitions. Word has length 43 [2024-11-13 13:26:34,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:26:34,449 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 414 transitions. [2024-11-13 13:26:34,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 18 states have internal predecessors, (60), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 13:26:34,449 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 414 transitions. [2024-11-13 13:26:34,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 13:26:34,452 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:26:34,452 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 13:26:34,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 13:26:34,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:26:34,653 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:26:34,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:26:34,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1669895503, now seen corresponding path program 2 times [2024-11-13 13:26:34,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:26:34,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720764020] [2024-11-13 13:26:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:26:34,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:26:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:34,771 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 13:26:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:34,821 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 13:26:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:34,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-13 13:26:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 13:26:34,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:26:34,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720764020] [2024-11-13 13:26:34,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720764020] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:26:34,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748996294] [2024-11-13 13:26:34,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:26:34,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:26:34,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:26:34,837 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:26:34,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 13:26:34,961 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:26:34,961 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:26:34,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 13:26:34,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:26:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 13:26:35,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:26:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 13:26:35,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748996294] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:26:35,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:26:35,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2024-11-13 13:26:35,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556082729] [2024-11-13 13:26:35,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:26:35,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 13:26:35,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:26:35,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 13:26:35,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-13 13:26:35,247 INFO L87 Difference]: Start difference. First operand 299 states and 414 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 13:26:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:26:35,642 INFO L93 Difference]: Finished difference Result 761 states and 1093 transitions. [2024-11-13 13:26:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 13:26:35,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2024-11-13 13:26:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:26:35,652 INFO L225 Difference]: With dead ends: 761 [2024-11-13 13:26:35,652 INFO L226 Difference]: Without dead ends: 671 [2024-11-13 13:26:35,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-13 13:26:35,654 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 115 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 13:26:35,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 394 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 13:26:35,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2024-11-13 13:26:35,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 427. [2024-11-13 13:26:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 380 states have (on average 1.4263157894736842) internal successors, (542), 396 states have internal predecessors, (542), 20 states have call successors, (20), 15 states have call predecessors, (20), 26 states have return successors, (44), 15 states have call predecessors, (44), 20 states have call successors, (44) [2024-11-13 13:26:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 606 transitions. [2024-11-13 13:26:35,775 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 606 transitions. Word has length 43 [2024-11-13 13:26:35,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:26:35,775 INFO L471 AbstractCegarLoop]: Abstraction has 427 states and 606 transitions. [2024-11-13 13:26:35,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 13:26:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 606 transitions. [2024-11-13 13:26:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 13:26:35,780 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:26:35,780 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:26:35,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 13:26:35,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:26:35,981 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:26:35,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:26:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2112865786, now seen corresponding path program 4 times [2024-11-13 13:26:35,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:26:35,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952437898] [2024-11-13 13:26:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:26:35,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:26:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:37,876 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 13:26:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:38,144 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 13:26:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:38,606 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-13 13:26:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 13:26:39,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:26:39,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952437898] [2024-11-13 13:26:39,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952437898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:26:39,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550207122] [2024-11-13 13:26:39,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 13:26:39,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:26:39,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:26:39,130 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:26:39,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 13:26:39,265 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 13:26:39,265 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:26:39,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-13 13:26:39,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:26:39,803 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:26:39,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 40 [2024-11-13 13:26:41,302 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-13 13:26:41,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 90 [2024-11-13 13:26:41,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:26:41,790 INFO L349 Elim1Store]: treesize reduction 84, result has 37.3 percent of original size [2024-11-13 13:26:41,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 136 treesize of output 121 [2024-11-13 13:26:42,365 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 124 treesize of output 76 [2024-11-13 13:26:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 13:26:42,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:26:44,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550207122] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:26:44,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:26:44,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 48 [2024-11-13 13:26:44,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697893363] [2024-11-13 13:26:44,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:26:44,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-13 13:26:44,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:26:44,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-13 13:26:44,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2773, Unknown=0, NotChecked=0, Total=2970 [2024-11-13 13:26:44,511 INFO L87 Difference]: Start difference. First operand 427 states and 606 transitions. Second operand has 48 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 41 states have internal predecessors, (72), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 13:26:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:26:50,582 INFO L93 Difference]: Finished difference Result 1382 states and 1998 transitions. [2024-11-13 13:26:50,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-13 13:26:50,583 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 41 states have internal predecessors, (72), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 44 [2024-11-13 13:26:50,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:26:50,590 INFO L225 Difference]: With dead ends: 1382 [2024-11-13 13:26:50,590 INFO L226 Difference]: Without dead ends: 937 [2024-11-13 13:26:50,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=513, Invalid=6293, Unknown=0, NotChecked=0, Total=6806 [2024-11-13 13:26:50,595 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 305 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-13 13:26:50,596 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 487 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1970 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-13 13:26:50,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2024-11-13 13:26:50,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 646. [2024-11-13 13:26:50,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 576 states have (on average 1.4409722222222223) internal successors, (830), 606 states have internal predecessors, (830), 28 states have call successors, (28), 15 states have call predecessors, (28), 41 states have return successors, (85), 24 states have call predecessors, (85), 28 states have call successors, (85) [2024-11-13 13:26:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 943 transitions. [2024-11-13 13:26:50,807 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 943 transitions. Word has length 44 [2024-11-13 13:26:50,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:26:50,808 INFO L471 AbstractCegarLoop]: Abstraction has 646 states and 943 transitions. [2024-11-13 13:26:50,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 41 states have internal predecessors, (72), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 13:26:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 943 transitions. [2024-11-13 13:26:50,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 13:26:50,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:26:50,814 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:26:50,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 13:26:51,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:26:51,015 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:26:51,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:26:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash -925438189, now seen corresponding path program 1 times [2024-11-13 13:26:51,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:26:51,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483349626] [2024-11-13 13:26:51,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:26:51,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:26:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:51,256 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 13:26:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:51,360 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-13 13:26:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:51,519 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-13 13:26:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 13:26:51,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:26:51,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483349626] [2024-11-13 13:26:51,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483349626] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:26:51,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924762900] [2024-11-13 13:26:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:26:51,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:26:51,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:26:51,528 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:26:51,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 13:26:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:26:51,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-13 13:26:51,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:26:51,769 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 22 treesize of output 7 [2024-11-13 13:26:52,081 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 24 treesize of output 19 [2024-11-13 13:26:52,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:26:52,189 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-11-13 13:26:52,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 26 [2024-11-13 13:26:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 13:26:52,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:27:04,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924762900] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:27:04,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:27:04,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2024-11-13 13:27:04,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875968952] [2024-11-13 13:27:04,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:27:04,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 13:27:04,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:27:04,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 13:27:04,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=865, Unknown=3, NotChecked=0, Total=992 [2024-11-13 13:27:04,919 INFO L87 Difference]: Start difference. First operand 646 states and 943 transitions. Second operand has 25 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 13:27:08,949 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] [2024-11-13 13:27:13,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:27:17,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:27:19,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:27:20,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:27:26,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:27:30,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:27:34,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:27:34,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:27:34,739 INFO L93 Difference]: Finished difference Result 1420 states and 2030 transitions. [2024-11-13 13:27:34,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-13 13:27:34,740 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2024-11-13 13:27:34,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:27:34,748 INFO L225 Difference]: With dead ends: 1420 [2024-11-13 13:27:34,749 INFO L226 Difference]: Without dead ends: 1022 [2024-11-13 13:27:34,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=440, Invalid=2749, Unknown=3, NotChecked=0, Total=3192 [2024-11-13 13:27:34,752 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 121 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 29 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.8s IncrementalHoareTripleChecker+Time [2024-11-13 13:27:34,753 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 565 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 917 Invalid, 10 Unknown, 0 Unchecked, 28.8s Time] [2024-11-13 13:27:34,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2024-11-13 13:27:34,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 782. [2024-11-13 13:27:34,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 699 states have (on average 1.436337625178827) internal successors, (1004), 734 states have internal predecessors, (1004), 32 states have call successors, (32), 19 states have call predecessors, (32), 50 states have return successors, (98), 28 states have call predecessors, (98), 32 states have call successors, (98) [2024-11-13 13:27:35,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1134 transitions. [2024-11-13 13:27:35,005 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1134 transitions. Word has length 44 [2024-11-13 13:27:35,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:27:35,006 INFO L471 AbstractCegarLoop]: Abstraction has 782 states and 1134 transitions. [2024-11-13 13:27:35,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 13:27:35,006 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1134 transitions. [2024-11-13 13:27:35,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 13:27:35,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:27:35,012 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:27:35,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 13:27:35,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 13:27:35,215 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:27:35,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:27:35,216 INFO L85 PathProgramCache]: Analyzing trace with hash 879839842, now seen corresponding path program 1 times [2024-11-13 13:27:35,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:27:35,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865919760] [2024-11-13 13:27:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:27:35,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:27:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:27:35,436 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 13:27:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:27:35,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 13:27:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:27:35,666 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-13 13:27:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:27:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 13:27:35,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:27:35,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865919760] [2024-11-13 13:27:35,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865919760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:27:35,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918415446] [2024-11-13 13:27:35,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:27:35,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:27:35,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:27:35,676 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:27:35,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 13:27:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:27:35,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-13 13:27:35,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:27:35,930 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:27:35,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2024-11-13 13:27:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 13:27:36,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:27:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 13:27:36,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918415446] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:27:36,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:27:36,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2024-11-13 13:27:36,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309133131] [2024-11-13 13:27:36,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:27:36,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 13:27:36,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:27:36,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 13:27:36,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-11-13 13:27:36,387 INFO L87 Difference]: Start difference. First operand 782 states and 1134 transitions. Second operand has 25 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 13:27:40,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:27:45,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:27:50,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:27:55,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:27:59,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:28:04,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:28:04,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:28:04,623 INFO L93 Difference]: Finished difference Result 1144 states and 1632 transitions. [2024-11-13 13:28:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-13 13:28:04,624 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 45 [2024-11-13 13:28:04,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:28:04,630 INFO L225 Difference]: With dead ends: 1144 [2024-11-13 13:28:04,630 INFO L226 Difference]: Without dead ends: 886 [2024-11-13 13:28:04,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=305, Invalid=1675, Unknown=0, NotChecked=0, Total=1980 [2024-11-13 13:28:04,633 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 104 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 9 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.4s IncrementalHoareTripleChecker+Time [2024-11-13 13:28:04,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 716 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 949 Invalid, 9 Unknown, 0 Unchecked, 27.4s Time] [2024-11-13 13:28:04,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2024-11-13 13:28:04,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 728. [2024-11-13 13:28:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 649 states have (on average 1.428351309707242) internal successors, (927), 680 states have internal predecessors, (927), 32 states have call successors, (32), 19 states have call predecessors, (32), 46 states have return successors, (92), 28 states have call predecessors, (92), 32 states have call successors, (92) [2024-11-13 13:28:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1051 transitions. [2024-11-13 13:28:04,825 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 1051 transitions. Word has length 45 [2024-11-13 13:28:04,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:28:04,825 INFO L471 AbstractCegarLoop]: Abstraction has 728 states and 1051 transitions. [2024-11-13 13:28:04,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 13:28:04,826 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 1051 transitions. [2024-11-13 13:28:04,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 13:28:04,829 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:28:04,829 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:28:04,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 13:28:05,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 13:28:05,030 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:28:05,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:28:05,030 INFO L85 PathProgramCache]: Analyzing trace with hash -381367183, now seen corresponding path program 1 times [2024-11-13 13:28:05,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:28:05,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696066835] [2024-11-13 13:28:05,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:28:05,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:28:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:05,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 13:28:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:05,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 13:28:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:05,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-13 13:28:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 13:28:06,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:28:06,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696066835] [2024-11-13 13:28:06,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696066835] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:28:06,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922160835] [2024-11-13 13:28:06,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:28:06,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:28:06,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:28:06,194 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:28:06,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 13:28:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:06,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-13 13:28:06,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:28:06,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 13:28:06,747 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 26 treesize of output 11 [2024-11-13 13:28:06,989 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 7 treesize of output 3 [2024-11-13 13:28:07,050 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 [2024-11-13 13:28:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:28:07,361 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:28:07,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-11-13 13:28:07,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-13 13:28:08,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-11-13 13:28:08,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-13 13:28:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 13:28:08,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922160835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:28:08,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:28:08,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 17] total 52 [2024-11-13 13:28:08,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370771377] [2024-11-13 13:28:08,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:28:08,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-13 13:28:08,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:28:08,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-13 13:28:08,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2368, Unknown=0, NotChecked=0, Total=2652 [2024-11-13 13:28:08,246 INFO L87 Difference]: Start difference. First operand 728 states and 1051 transitions. Second operand has 52 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 46 states have internal predecessors, (104), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-13 13:28:16,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:28:16,819 INFO L93 Difference]: Finished difference Result 1293 states and 1830 transitions. [2024-11-13 13:28:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2024-11-13 13:28:16,820 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 46 states have internal predecessors, (104), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 45 [2024-11-13 13:28:16,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:28:16,827 INFO L225 Difference]: With dead ends: 1293 [2024-11-13 13:28:16,827 INFO L226 Difference]: Without dead ends: 1099 [2024-11-13 13:28:16,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6277 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2364, Invalid=17376, Unknown=0, NotChecked=0, Total=19740 [2024-11-13 13:28:16,832 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 757 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 3270 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 3495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 3270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-13 13:28:16,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 1528 Invalid, 3495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 3270 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-13 13:28:16,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2024-11-13 13:28:17,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 789. [2024-11-13 13:28:17,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 705 states have (on average 1.4297872340425533) internal successors, (1008), 739 states have internal predecessors, (1008), 33 states have call successors, (33), 21 states have call predecessors, (33), 50 states have return successors, (75), 28 states have call predecessors, (75), 33 states have call successors, (75) [2024-11-13 13:28:17,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1116 transitions. [2024-11-13 13:28:17,043 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1116 transitions. Word has length 45 [2024-11-13 13:28:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:28:17,044 INFO L471 AbstractCegarLoop]: Abstraction has 789 states and 1116 transitions. [2024-11-13 13:28:17,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 46 states have internal predecessors, (104), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-13 13:28:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1116 transitions. [2024-11-13 13:28:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 13:28:17,047 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:28:17,047 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:28:17,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 13:28:17,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 13:28:17,251 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:28:17,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:28:17,254 INFO L85 PathProgramCache]: Analyzing trace with hash 977217033, now seen corresponding path program 3 times [2024-11-13 13:28:17,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:28:17,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700749001] [2024-11-13 13:28:17,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:28:17,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:28:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:17,456 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 13:28:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:17,462 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-13 13:28:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:17,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-13 13:28:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 13:28:17,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:28:17,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700749001] [2024-11-13 13:28:17,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700749001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:28:17,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673626109] [2024-11-13 13:28:17,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:28:17,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:28:17,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:28:17,525 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:28:17,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 13:28:17,649 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 13:28:17,650 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:28:17,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 13:28:17,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:28:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 13:28:17,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:28:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 13:28:17,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673626109] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:28:17,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:28:17,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2024-11-13 13:28:17,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486116974] [2024-11-13 13:28:17,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:28:17,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 13:28:17,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:28:17,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 13:28:17,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-13 13:28:17,998 INFO L87 Difference]: Start difference. First operand 789 states and 1116 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 13:28:18,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:28:18,228 INFO L93 Difference]: Finished difference Result 925 states and 1284 transitions. [2024-11-13 13:28:18,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 13:28:18,229 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 45 [2024-11-13 13:28:18,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:28:18,232 INFO L225 Difference]: With dead ends: 925 [2024-11-13 13:28:18,232 INFO L226 Difference]: Without dead ends: 364 [2024-11-13 13:28:18,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2024-11-13 13:28:18,236 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 85 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 13:28:18,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 236 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 13:28:18,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-13 13:28:18,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 346. [2024-11-13 13:28:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 307 states have (on average 1.3355048859934853) internal successors, (410), 318 states have internal predecessors, (410), 17 states have call successors, (17), 12 states have call predecessors, (17), 21 states have return successors, (32), 15 states have call predecessors, (32), 17 states have call successors, (32) [2024-11-13 13:28:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 459 transitions. [2024-11-13 13:28:18,349 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 459 transitions. Word has length 45 [2024-11-13 13:28:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:28:18,350 INFO L471 AbstractCegarLoop]: Abstraction has 346 states and 459 transitions. [2024-11-13 13:28:18,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 13:28:18,350 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 459 transitions. [2024-11-13 13:28:18,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-13 13:28:18,351 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:28:18,352 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:28:18,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 13:28:18,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-13 13:28:18,552 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:28:18,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:28:18,553 INFO L85 PathProgramCache]: Analyzing trace with hash -937672154, now seen corresponding path program 5 times [2024-11-13 13:28:18,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:28:18,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943905701] [2024-11-13 13:28:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:28:18,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:28:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:18,694 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 13:28:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:18,699 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 13:28:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:18,705 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-13 13:28:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 13:28:18,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:28:18,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943905701] [2024-11-13 13:28:18,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943905701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:28:18,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594307382] [2024-11-13 13:28:18,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 13:28:18,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:28:18,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:28:18,721 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:28:18,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 13:28:18,853 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-13 13:28:18,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:28:18,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 13:28:18,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:28:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 13:28:19,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:28:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 13:28:19,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594307382] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:28:19,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:28:19,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-11-13 13:28:19,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165653595] [2024-11-13 13:28:19,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:28:19,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 13:28:19,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:28:19,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 13:28:19,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-13 13:28:19,121 INFO L87 Difference]: Start difference. First operand 346 states and 459 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-13 13:28:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:28:19,568 INFO L93 Difference]: Finished difference Result 819 states and 1154 transitions. [2024-11-13 13:28:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 13:28:19,569 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 46 [2024-11-13 13:28:19,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:28:19,573 INFO L225 Difference]: With dead ends: 819 [2024-11-13 13:28:19,574 INFO L226 Difference]: Without dead ends: 706 [2024-11-13 13:28:19,575 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2024-11-13 13:28:19,575 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 77 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 13:28:19,576 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 267 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 13:28:19,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2024-11-13 13:28:19,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 493. [2024-11-13 13:28:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 444 states have (on average 1.3783783783783783) internal successors, (612), 456 states have internal predecessors, (612), 20 states have call successors, (20), 13 states have call predecessors, (20), 28 states have return successors, (57), 23 states have call predecessors, (57), 20 states have call successors, (57) [2024-11-13 13:28:19,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 689 transitions. [2024-11-13 13:28:19,715 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 689 transitions. Word has length 46 [2024-11-13 13:28:19,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:28:19,715 INFO L471 AbstractCegarLoop]: Abstraction has 493 states and 689 transitions. [2024-11-13 13:28:19,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-13 13:28:19,715 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 689 transitions. [2024-11-13 13:28:19,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 13:28:19,718 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:28:19,718 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:28:19,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 13:28:19,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 13:28:19,919 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:28:19,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:28:19,919 INFO L85 PathProgramCache]: Analyzing trace with hash -38730172, now seen corresponding path program 1 times [2024-11-13 13:28:19,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:28:19,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313544623] [2024-11-13 13:28:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:28:19,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:28:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:20,336 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 13:28:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:20,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 13:28:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:20,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 13:28:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 13:28:20,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:28:20,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313544623] [2024-11-13 13:28:20,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313544623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:28:20,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761848037] [2024-11-13 13:28:20,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:28:20,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:28:20,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:28:20,595 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:28:20,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 13:28:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:20,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-13 13:28:20,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:28:20,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 13:28:21,019 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 31 treesize of output 12 [2024-11-13 13:28:21,134 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 16 treesize of output 8 [2024-11-13 13:28:21,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 13:28:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:28:21,389 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:28:21,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-13 13:28:21,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-13 13:28:22,055 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 16 treesize of output 14 [2024-11-13 13:28:22,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-13 13:28:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 13:28:22,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761848037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:28:22,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:28:22,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 17] total 44 [2024-11-13 13:28:22,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250552371] [2024-11-13 13:28:22,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:28:22,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-13 13:28:22,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:28:22,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-13 13:28:22,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2024-11-13 13:28:22,150 INFO L87 Difference]: Start difference. First operand 493 states and 689 transitions. Second operand has 44 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-13 13:28:26,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:28:30,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:28:34,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:28:38,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:28:43,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:28:47,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:28:52,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:28:57,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:28:58,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:28:58,761 INFO L93 Difference]: Finished difference Result 565 states and 783 transitions. [2024-11-13 13:28:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-13 13:28:58,762 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 47 [2024-11-13 13:28:58,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:28:58,765 INFO L225 Difference]: With dead ends: 565 [2024-11-13 13:28:58,765 INFO L226 Difference]: Without dead ends: 556 [2024-11-13 13:28:58,766 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=693, Invalid=3999, Unknown=0, NotChecked=0, Total=4692 [2024-11-13 13:28:58,767 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 155 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 50 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.3s IncrementalHoareTripleChecker+Time [2024-11-13 13:28:58,767 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 510 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 963 Invalid, 11 Unknown, 0 Unchecked, 35.3s Time] [2024-11-13 13:28:58,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2024-11-13 13:28:58,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 493. [2024-11-13 13:28:58,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 444 states have (on average 1.3761261261261262) internal successors, (611), 456 states have internal predecessors, (611), 20 states have call successors, (20), 13 states have call predecessors, (20), 28 states have return successors, (57), 23 states have call predecessors, (57), 20 states have call successors, (57) [2024-11-13 13:28:58,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 688 transitions. [2024-11-13 13:28:58,993 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 688 transitions. Word has length 47 [2024-11-13 13:28:58,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:28:58,994 INFO L471 AbstractCegarLoop]: Abstraction has 493 states and 688 transitions. [2024-11-13 13:28:58,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-13 13:28:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 688 transitions. [2024-11-13 13:28:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 13:28:58,997 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:28:58,997 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:28:59,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 13:28:59,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 13:28:59,200 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:28:59,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:28:59,200 INFO L85 PathProgramCache]: Analyzing trace with hash -507672589, now seen corresponding path program 1 times [2024-11-13 13:28:59,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:28:59,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092513939] [2024-11-13 13:28:59,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:28:59,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:28:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:59,580 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 13:28:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:59,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 13:28:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:59,665 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 13:28:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 13:28:59,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:28:59,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092513939] [2024-11-13 13:28:59,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092513939] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:28:59,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115515228] [2024-11-13 13:28:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:28:59,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:28:59,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:28:59,702 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:28:59,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 13:28:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:28:59,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-13 13:28:59,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:29:00,043 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 13:29:00,043 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:29:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:29:00,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115515228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:29:00,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:29:00,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 17 [2024-11-13 13:29:00,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723866281] [2024-11-13 13:29:00,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:29:00,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 13:29:00,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:29:00,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 13:29:00,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-11-13 13:29:00,270 INFO L87 Difference]: Start difference. First operand 493 states and 688 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 12 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 13:29:00,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:29:00,568 INFO L93 Difference]: Finished difference Result 1077 states and 1605 transitions. [2024-11-13 13:29:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 13:29:00,569 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 12 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2024-11-13 13:29:00,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:29:00,574 INFO L225 Difference]: With dead ends: 1077 [2024-11-13 13:29:00,574 INFO L226 Difference]: Without dead ends: 682 [2024-11-13 13:29:00,576 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-11-13 13:29:00,577 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 13:29:00,578 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 314 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 13:29:00,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2024-11-13 13:29:00,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 619. [2024-11-13 13:29:00,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 542 states have (on average 1.311808118081181) internal successors, (711), 569 states have internal predecessors, (711), 31 states have call successors, (31), 13 states have call predecessors, (31), 45 states have return successors, (126), 36 states have call predecessors, (126), 31 states have call successors, (126) [2024-11-13 13:29:00,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 868 transitions. [2024-11-13 13:29:00,788 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 868 transitions. Word has length 48 [2024-11-13 13:29:00,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:29:00,789 INFO L471 AbstractCegarLoop]: Abstraction has 619 states and 868 transitions. [2024-11-13 13:29:00,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 12 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 13:29:00,789 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 868 transitions. [2024-11-13 13:29:00,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 13:29:00,792 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:29:00,792 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:29:00,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 13:29:00,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 13:29:00,993 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:29:00,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:29:00,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1007585575, now seen corresponding path program 1 times [2024-11-13 13:29:00,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:29:00,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691431210] [2024-11-13 13:29:00,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:29:00,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:29:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:01,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 13:29:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:01,998 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 13:29:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:02,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 13:29:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 13:29:02,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:29:02,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691431210] [2024-11-13 13:29:02,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691431210] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:29:02,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883694504] [2024-11-13 13:29:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:29:02,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:29:02,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:29:02,130 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:29:02,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 13:29:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:02,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-13 13:29:02,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:29:02,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 13:29:02,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:29:02,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2024-11-13 13:29:02,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:29:02,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2024-11-13 13:29:02,965 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2024-11-13 13:29:02,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 29 [2024-11-13 13:29:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:29:03,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:29:03,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883694504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:29:03,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:29:03,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 31 [2024-11-13 13:29:03,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788474635] [2024-11-13 13:29:03,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:29:03,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 13:29:03,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:29:03,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 13:29:03,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2024-11-13 13:29:03,575 INFO L87 Difference]: Start difference. First operand 619 states and 868 transitions. Second operand has 31 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 13:29:08,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:29:12,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:29:14,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:29:15,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:29:19,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:29:23,689 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] [2024-11-13 13:29:23,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:29:23,856 INFO L93 Difference]: Finished difference Result 795 states and 1099 transitions. [2024-11-13 13:29:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 13:29:23,857 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2024-11-13 13:29:23,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:29:23,859 INFO L225 Difference]: With dead ends: 795 [2024-11-13 13:29:23,860 INFO L226 Difference]: Without dead ends: 742 [2024-11-13 13:29:23,860 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=260, Invalid=1632, Unknown=0, NotChecked=0, Total=1892 [2024-11-13 13:29:23,861 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 54 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 11 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2024-11-13 13:29:23,861 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 459 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 817 Invalid, 6 Unknown, 0 Unchecked, 19.7s Time] [2024-11-13 13:29:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2024-11-13 13:29:24,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 629. [2024-11-13 13:29:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 553 states have (on average 1.3128390596745028) internal successors, (726), 579 states have internal predecessors, (726), 30 states have call successors, (30), 14 states have call predecessors, (30), 45 states have return successors, (124), 35 states have call predecessors, (124), 30 states have call successors, (124) [2024-11-13 13:29:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 880 transitions. [2024-11-13 13:29:24,071 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 880 transitions. Word has length 49 [2024-11-13 13:29:24,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:29:24,072 INFO L471 AbstractCegarLoop]: Abstraction has 629 states and 880 transitions. [2024-11-13 13:29:24,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 13:29:24,072 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 880 transitions. [2024-11-13 13:29:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 13:29:24,077 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:29:24,077 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:29:24,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 13:29:24,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 13:29:24,281 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:29:24,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:29:24,281 INFO L85 PathProgramCache]: Analyzing trace with hash -195348151, now seen corresponding path program 2 times [2024-11-13 13:29:24,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:29:24,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448973306] [2024-11-13 13:29:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:29:24,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:29:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:24,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 13:29:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:24,851 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 13:29:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:24,956 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-13 13:29:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 13:29:24,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:29:24,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448973306] [2024-11-13 13:29:24,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448973306] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:29:24,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633044663] [2024-11-13 13:29:24,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:29:24,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:29:24,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:29:24,962 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:29:24,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 13:29:25,077 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:29:25,077 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:29:25,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-13 13:29:25,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:29:25,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 13:29:25,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:29:25,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2024-11-13 13:29:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:29:25,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:29:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 13:29:25,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633044663] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:29:25,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:29:25,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 9] total 26 [2024-11-13 13:29:25,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70117905] [2024-11-13 13:29:25,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:29:25,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 13:29:25,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:29:25,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 13:29:25,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2024-11-13 13:29:25,812 INFO L87 Difference]: Start difference. First operand 629 states and 880 transitions. Second operand has 26 states, 26 states have (on average 3.576923076923077) internal successors, (93), 25 states have internal predecessors, (93), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 13:29:26,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:29:26,744 INFO L93 Difference]: Finished difference Result 1028 states and 1432 transitions. [2024-11-13 13:29:26,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 13:29:26,745 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.576923076923077) internal successors, (93), 25 states have internal predecessors, (93), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) Word has length 49 [2024-11-13 13:29:26,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:29:26,750 INFO L225 Difference]: With dead ends: 1028 [2024-11-13 13:29:26,750 INFO L226 Difference]: Without dead ends: 784 [2024-11-13 13:29:26,751 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 13:29:26,752 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 72 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 13:29:26,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 369 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 13:29:26,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2024-11-13 13:29:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 689. [2024-11-13 13:29:26,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 606 states have (on average 1.3184818481848184) internal successors, (799), 636 states have internal predecessors, (799), 32 states have call successors, (32), 15 states have call predecessors, (32), 50 states have return successors, (139), 37 states have call predecessors, (139), 32 states have call successors, (139) [2024-11-13 13:29:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 970 transitions. [2024-11-13 13:29:26,952 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 970 transitions. Word has length 49 [2024-11-13 13:29:26,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:29:26,952 INFO L471 AbstractCegarLoop]: Abstraction has 689 states and 970 transitions. [2024-11-13 13:29:26,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.576923076923077) internal successors, (93), 25 states have internal predecessors, (93), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 13:29:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 970 transitions. [2024-11-13 13:29:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 13:29:26,956 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:29:26,956 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:29:26,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 13:29:27,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 13:29:27,157 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:29:27,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:29:27,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1161204555, now seen corresponding path program 3 times [2024-11-13 13:29:27,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:29:27,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99509140] [2024-11-13 13:29:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:29:27,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:29:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:27,745 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 13:29:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:27,835 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 13:29:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:27,842 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-13 13:29:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 13:29:27,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:29:27,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99509140] [2024-11-13 13:29:27,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99509140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:29:27,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764544845] [2024-11-13 13:29:27,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:29:27,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:29:27,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:29:27,962 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:29:27,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 13:29:28,076 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-13 13:29:28,076 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:29:28,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-13 13:29:28,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:29:28,110 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 8 treesize of output 1 [2024-11-13 13:29:28,330 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:29:28,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2024-11-13 13:29:28,460 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:29:28,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 22 [2024-11-13 13:29:28,505 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:29:28,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2024-11-13 13:29:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 13:29:28,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:29:29,507 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:29:29,507 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 58 treesize of output 40 [2024-11-13 13:29:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 13:29:29,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764544845] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:29:29,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:29:29,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 16] total 43 [2024-11-13 13:29:29,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198798371] [2024-11-13 13:29:29,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:29:29,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-13 13:29:29,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:29:29,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-13 13:29:29,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 13:29:29,583 INFO L87 Difference]: Start difference. First operand 689 states and 970 transitions. Second operand has 43 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-13 13:29:31,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:29:31,597 INFO L93 Difference]: Finished difference Result 816 states and 1144 transitions. [2024-11-13 13:29:31,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-13 13:29:31,598 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) Word has length 50 [2024-11-13 13:29:31,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:29:31,602 INFO L225 Difference]: With dead ends: 816 [2024-11-13 13:29:31,602 INFO L226 Difference]: Without dead ends: 807 [2024-11-13 13:29:31,603 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=703, Invalid=3853, Unknown=0, NotChecked=0, Total=4556 [2024-11-13 13:29:31,603 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 177 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 13:29:31,604 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 482 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 13:29:31,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2024-11-13 13:29:31,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 689. [2024-11-13 13:29:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 606 states have (on average 1.316831683168317) internal successors, (798), 636 states have internal predecessors, (798), 32 states have call successors, (32), 15 states have call predecessors, (32), 50 states have return successors, (139), 37 states have call predecessors, (139), 32 states have call successors, (139) [2024-11-13 13:29:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 969 transitions. [2024-11-13 13:29:31,812 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 969 transitions. Word has length 50 [2024-11-13 13:29:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:29:31,813 INFO L471 AbstractCegarLoop]: Abstraction has 689 states and 969 transitions. [2024-11-13 13:29:31,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-13 13:29:31,813 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 969 transitions. [2024-11-13 13:29:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 13:29:31,816 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:29:31,816 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:29:31,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 13:29:32,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:29:32,017 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:29:32,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:29:32,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2072036187, now seen corresponding path program 1 times [2024-11-13 13:29:32,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:29:32,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390787306] [2024-11-13 13:29:32,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:29:32,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:29:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 13:29:32,050 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 13:29:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 13:29:32,094 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-13 13:29:32,094 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-13 13:29:32,096 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-13 13:29:32,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-13 13:29:32,102 INFO L407 BasicCegarLoop]: Path program histogram: [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:29:32,142 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-13 13:29:32,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 01:29:32 BoogieIcfgContainer [2024-11-13 13:29:32,146 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-13 13:29:32,147 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 13:29:32,147 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 13:29:32,147 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 13:29:32,148 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:23:46" (3/4) ... [2024-11-13 13:29:32,151 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-13 13:29:32,152 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 13:29:32,153 INFO L158 Benchmark]: Toolchain (without parser) took 346928.05ms. Allocated memory was 142.6MB in the beginning and 352.3MB in the end (delta: 209.7MB). Free memory was 119.1MB in the beginning and 186.0MB in the end (delta: -66.9MB). Peak memory consumption was 137.2MB. Max. memory is 16.1GB. [2024-11-13 13:29:32,153 INFO L158 Benchmark]: CDTParser took 1.46ms. Allocated memory is still 142.6MB. Free memory is still 80.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 13:29:32,154 INFO L158 Benchmark]: CACSL2BoogieTranslator took 407.68ms. Allocated memory is still 142.6MB. Free memory was 119.1MB in the beginning and 107.4MB in the end (delta: 11.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 13:29:32,154 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.12ms. Allocated memory is still 142.6MB. Free memory was 107.4MB in the beginning and 106.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 13:29:32,154 INFO L158 Benchmark]: Boogie Preprocessor took 71.27ms. Allocated memory is still 142.6MB. Free memory was 106.1MB in the beginning and 104.4MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 13:29:32,154 INFO L158 Benchmark]: RCFGBuilder took 629.50ms. Allocated memory is still 142.6MB. Free memory was 104.4MB in the beginning and 91.1MB in the end (delta: 13.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 13:29:32,155 INFO L158 Benchmark]: TraceAbstraction took 345761.41ms. Allocated memory was 142.6MB in the beginning and 352.3MB in the end (delta: 209.7MB). Free memory was 90.6MB in the beginning and 186.0MB in the end (delta: -95.4MB). Peak memory consumption was 112.0MB. Max. memory is 16.1GB. [2024-11-13 13:29:32,155 INFO L158 Benchmark]: Witness Printer took 5.50ms. Allocated memory is still 352.3MB. Free memory was 186.0MB in the beginning and 186.0MB in the end (delta: 72.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 13:29:32,156 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.46ms. Allocated memory is still 142.6MB. Free memory is still 80.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 407.68ms. Allocated memory is still 142.6MB. Free memory was 119.1MB in the beginning and 107.4MB in the end (delta: 11.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.12ms. Allocated memory is still 142.6MB. Free memory was 107.4MB in the beginning and 106.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 71.27ms. Allocated memory is still 142.6MB. Free memory was 106.1MB in the beginning and 104.4MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 629.50ms. Allocated memory is still 142.6MB. Free memory was 104.4MB in the beginning and 91.1MB in the end (delta: 13.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 345761.41ms. Allocated memory was 142.6MB in the beginning and 352.3MB in the end (delta: 209.7MB). Free memory was 90.6MB in the beginning and 186.0MB in the end (delta: -95.4MB). Peak memory consumption was 112.0MB. Max. memory is 16.1GB. * Witness Printer took 5.50ms. Allocated memory is still 352.3MB. Free memory was 186.0MB in the beginning and 186.0MB in the end (delta: 72.0kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 57]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 25. Possible FailurePath: [L17] int N; VAL [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [N=2, i=0, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [N=2, i=1, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [N=2, i=2, x={9:0}] [L40] COND FALSE !(i < N) VAL [N=2, x={9:0}] [L45] CALL, EXPR xor(x) VAL [N=2, \old(x)={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [N=2, \old(x)={9:0}, i=1, res=10, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] VAL [N=2, \old(x)={9:0}, i=1, res=10, x={9:0}] [L25] EXPR res ^ x[i] VAL [N=2, \old(x)={9:0}, i=1, x={9:0}] [L25] res = res ^ x[i] [L24] i++ VAL [N=2, \old(x)={9:0}, i=2, res=-4294967285, x={9:0}] [L24] COND FALSE !(i < N) VAL [N=2, \old(x)={9:0}, res=-4294967285, x={9:0}] [L27] return res; VAL [N=2, \old(x)={9:0}, \result=11, x={9:0}] [L45] RET, EXPR xor(x) VAL [N=2, x={9:0}] [L45] ret = xor(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp VAL [N=2] [L48] CALL, EXPR xor(x) VAL [N=2, \old(x)={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [N=2, \old(x)={9:0}, i=1, res=-11, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] VAL [N=2, \old(x)={9:0}, i=1, res=-11, x={9:0}] [L25] EXPR res ^ x[i] VAL [N=2, \old(x)={9:0}, i=1, x={9:0}] [L25] res = res ^ x[i] [L24] i++ VAL [N=2, \old(x)={9:0}, i=2, res=-1, x={9:0}] [L24] COND FALSE !(i < N) VAL [N=2, \old(x)={9:0}, res=-1, x={9:0}] [L27] return res; VAL [N=2, \old(x)={9:0}, \result=-1, x={9:0}] [L48] RET, EXPR xor(x) VAL [N=2, ret=11, x={9:0}] [L48] ret2 = xor(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [N=2, i=0, ret2=-1, ret=11, temp=-11, x={9:0}] [L50] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd 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 -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2024-11-13 13:29:35,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 13:29:35,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 13:29:35,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 13:29:35,891 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 13:29:35,892 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 13:29:35,893 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/array-crafted/xor5.i Unable to find full path for "g++" [2024-11-13 13:29:38,094 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 13:29:38,390 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 13:29:38,391 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/sv-benchmarks/c/array-crafted/xor5.i [2024-11-13 13:29:38,406 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/data/25d75cc53/d2d573ef06c142b48cfd827a9869aa99/FLAG9026cf53f [2024-11-13 13:29:38,692 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/data/25d75cc53/d2d573ef06c142b48cfd827a9869aa99 [2024-11-13 13:29:38,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 13:29:38,700 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 13:29:38,701 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 13:29:38,704 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 13:29:38,710 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 13:29:38,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:29:38" (1/1) ... [2024-11-13 13:29:38,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6be623b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:38, skipping insertion in model container [2024-11-13 13:29:38,712 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:29:38" (1/1) ... [2024-11-13 13:29:38,735 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 13:29:38,976 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_d942fe7e-5789-4c3e-a589-39c42f66a498/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2024-11-13 13:29:38,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:29:39,003 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 13:29:39,047 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_d942fe7e-5789-4c3e-a589-39c42f66a498/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2024-11-13 13:29:39,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:29:39,078 INFO L204 MainTranslator]: Completed translation [2024-11-13 13:29:39,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:39 WrapperNode [2024-11-13 13:29:39,080 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 13:29:39,082 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 13:29:39,082 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 13:29:39,082 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 13:29:39,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:39" (1/1) ... [2024-11-13 13:29:39,106 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:39" (1/1) ... [2024-11-13 13:29:39,145 INFO L138 Inliner]: procedures = 18, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2024-11-13 13:29:39,147 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 13:29:39,147 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 13:29:39,148 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 13:29:39,148 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 13:29:39,160 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:39" (1/1) ... [2024-11-13 13:29:39,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:39" (1/1) ... [2024-11-13 13:29:39,165 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:39" (1/1) ... [2024-11-13 13:29:39,197 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 7, 11]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 5 writes are split as follows [0, 0, 5]. [2024-11-13 13:29:39,198 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:39" (1/1) ... [2024-11-13 13:29:39,198 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:39" (1/1) ... [2024-11-13 13:29:39,216 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:39" (1/1) ... [2024-11-13 13:29:39,223 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:39" (1/1) ... [2024-11-13 13:29:39,225 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:39" (1/1) ... [2024-11-13 13:29:39,230 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:39" (1/1) ... [2024-11-13 13:29:39,232 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 13:29:39,237 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 13:29:39,237 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 13:29:39,238 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 13:29:39,239 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:39" (1/1) ... [2024-11-13 13:29:39,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:29:39,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:29:39,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 13:29:39,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 13:29:39,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 13:29:39,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-13 13:29:39,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-13 13:29:39,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-13 13:29:39,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 13:29:39,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-13 13:29:39,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-13 13:29:39,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-11-13 13:29:39,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 13:29:39,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 13:29:39,331 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2024-11-13 13:29:39,331 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2024-11-13 13:29:39,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 13:29:39,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-13 13:29:39,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-13 13:29:39,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-11-13 13:29:39,442 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 13:29:39,444 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 13:29:39,682 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-13 13:29:39,682 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 13:29:39,695 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 13:29:39,695 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 13:29:39,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:29:39 BoogieIcfgContainer [2024-11-13 13:29:39,696 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 13:29:39,699 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 13:29:39,700 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 13:29:39,706 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 13:29:39,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:29:38" (1/3) ... [2024-11-13 13:29:39,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63892b57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:29:39, skipping insertion in model container [2024-11-13 13:29:39,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:39" (2/3) ... [2024-11-13 13:29:39,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63892b57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:29:39, skipping insertion in model container [2024-11-13 13:29:39,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:29:39" (3/3) ... [2024-11-13 13:29:39,710 INFO L112 eAbstractionObserver]: Analyzing ICFG xor5.i [2024-11-13 13:29:39,731 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 13:29:39,733 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG xor5.i that has 2 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 13:29:39,805 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 13:29:39,820 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;@4bccd73b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 13:29:39,820 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 13:29:39,826 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 13:29:39,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 13:29:39,833 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:29:39,834 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:29:39,834 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:29:39,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:29:39,840 INFO L85 PathProgramCache]: Analyzing trace with hash 793290554, now seen corresponding path program 1 times [2024-11-13 13:29:39,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:29:39,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387316497] [2024-11-13 13:29:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:29:39,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:29:39,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:29:39,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:29:39,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 13:29:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:40,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 13:29:40,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:29:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 13:29:40,170 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:29:40,171 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:29:40,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387316497] [2024-11-13 13:29:40,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387316497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:29:40,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:29:40,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:29:40,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399879064] [2024-11-13 13:29:40,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:29:40,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:29:40,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:29:40,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:29:40,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:29:40,217 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 13:29:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:29:40,312 INFO L93 Difference]: Finished difference Result 49 states and 69 transitions. [2024-11-13 13:29:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:29:40,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2024-11-13 13:29:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:29:40,325 INFO L225 Difference]: With dead ends: 49 [2024-11-13 13:29:40,325 INFO L226 Difference]: Without dead ends: 22 [2024-11-13 13:29:40,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:29:40,333 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 13:29:40,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 13:29:40,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-13 13:29:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-13 13:29:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 13:29:40,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-13 13:29:40,390 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 30 [2024-11-13 13:29:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:29:40,392 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-13 13:29:40,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 13:29:40,392 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-13 13:29:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 13:29:40,396 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:29:40,396 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:29:40,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 13:29:40,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:29:40,597 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:29:40,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:29:40,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1503568239, now seen corresponding path program 1 times [2024-11-13 13:29:40,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:29:40,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489562233] [2024-11-13 13:29:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:29:40,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:29:40,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:29:40,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:29:40,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 13:29:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:40,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 13:29:40,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:29:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 13:29:40,832 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:29:40,832 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:29:40,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489562233] [2024-11-13 13:29:40,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489562233] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:29:40,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:29:40,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 13:29:40,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780322592] [2024-11-13 13:29:40,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:29:40,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:29:40,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:29:40,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:29:40,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:29:40,840 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 13:29:40,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:29:40,942 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2024-11-13 13:29:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:29:40,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-13 13:29:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:29:40,947 INFO L225 Difference]: With dead ends: 38 [2024-11-13 13:29:40,947 INFO L226 Difference]: Without dead ends: 23 [2024-11-13 13:29:40,948 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:29:40,949 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 13:29:40,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 26 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 13:29:40,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-13 13:29:40,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-13 13:29:40,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 13:29:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-11-13 13:29:40,965 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 31 [2024-11-13 13:29:40,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:29:40,965 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-11-13 13:29:40,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 13:29:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-11-13 13:29:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-13 13:29:40,966 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:29:40,966 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:29:40,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 13:29:41,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:29:41,167 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:29:41,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:29:41,168 INFO L85 PathProgramCache]: Analyzing trace with hash -157328479, now seen corresponding path program 1 times [2024-11-13 13:29:41,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:29:41,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555264380] [2024-11-13 13:29:41,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:29:41,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:29:41,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:29:41,172 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:29:41,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 13:29:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:41,324 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 13:29:41,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:29:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 13:29:41,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:29:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 13:29:41,708 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:29:41,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555264380] [2024-11-13 13:29:41,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555264380] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 13:29:41,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 13:29:41,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2024-11-13 13:29:41,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799060200] [2024-11-13 13:29:41,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:29:41,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:29:41,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:29:41,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:29:41,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-13 13:29:41,711 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 13:29:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:29:41,865 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2024-11-13 13:29:41,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:29:41,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-11-13 13:29:41,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:29:41,868 INFO L225 Difference]: With dead ends: 36 [2024-11-13 13:29:41,868 INFO L226 Difference]: Without dead ends: 24 [2024-11-13 13:29:41,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:29:41,869 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 13:29:41,870 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 13:29:41,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-13 13:29:41,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-13 13:29:41,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 13:29:41,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-13 13:29:41,878 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 34 [2024-11-13 13:29:41,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:29:41,879 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-13 13:29:41,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 13:29:41,880 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-13 13:29:41,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-13 13:29:41,881 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:29:41,881 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 13:29:41,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 13:29:42,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:29:42,082 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:29:42,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:29:42,083 INFO L85 PathProgramCache]: Analyzing trace with hash 579128892, now seen corresponding path program 1 times [2024-11-13 13:29:42,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:29:42,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782864119] [2024-11-13 13:29:42,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:29:42,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:29:42,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:29:42,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:29:42,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 13:29:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:29:42,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 13:29:42,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:29:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 13:29:42,268 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:29:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 13:29:42,517 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:29:42,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782864119] [2024-11-13 13:29:42,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782864119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:29:42,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:29:42,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8] total 10 [2024-11-13 13:29:42,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919135494] [2024-11-13 13:29:42,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:29:42,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:29:42,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:29:42,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:29:42,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:29:42,524 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 13:29:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:29:42,907 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2024-11-13 13:29:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 13:29:42,908 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 35 [2024-11-13 13:29:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:29:42,911 INFO L225 Difference]: With dead ends: 62 [2024-11-13 13:29:42,911 INFO L226 Difference]: Without dead ends: 43 [2024-11-13 13:29:42,911 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-13 13:29:42,912 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 13:29:42,913 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 100 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 13:29:42,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-13 13:29:42,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 25. [2024-11-13 13:29:42,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 13:29:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-11-13 13:29:42,923 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 35 [2024-11-13 13:29:42,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:29:42,924 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-11-13 13:29:42,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 13:29:42,924 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-11-13 13:29:42,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 13:29:42,925 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:29:42,925 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:29:42,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 13:29:43,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:29:43,126 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:29:43,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:29:43,126 INFO L85 PathProgramCache]: Analyzing trace with hash 901518661, now seen corresponding path program 2 times [2024-11-13 13:29:43,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:29:43,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1522458105] [2024-11-13 13:29:43,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:29:43,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:29:43,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:29:43,130 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:29:43,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 13:29:43,638 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:29:43,639 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:29:43,642 WARN L253 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-13 13:29:43,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:29:43,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 13:29:43,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 13:29:44,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:29:44,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2024-11-13 13:29:45,147 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:29:45,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 34 [2024-11-13 13:29:45,580 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 13:29:45,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:29:45,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:29:45,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 58 [2024-11-13 13:29:46,112 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 13:29:46,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:29:46,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 28 [2024-11-13 13:29:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 13:29:46,417 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:30:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 13:30:09,718 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:30:09,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522458105] [2024-11-13 13:30:09,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522458105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:30:09,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:30:09,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19] total 40 [2024-11-13 13:30:09,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441789080] [2024-11-13 13:30:09,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:30:09,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-13 13:30:09,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:30:09,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-13 13:30:09,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2024-11-13 13:30:09,722 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 40 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 32 states have internal predecessors, (51), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 13:30:25,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:30:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:30:31,140 INFO L93 Difference]: Finished difference Result 81 states and 108 transitions. [2024-11-13 13:30:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-13 13:30:31,141 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 32 states have internal predecessors, (51), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2024-11-13 13:30:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:30:31,143 INFO L225 Difference]: With dead ends: 81 [2024-11-13 13:30:31,143 INFO L226 Difference]: Without dead ends: 57 [2024-11-13 13:30:31,145 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=362, Invalid=3058, Unknown=2, NotChecked=0, Total=3422 [2024-11-13 13:30:31,146 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2024-11-13 13:30:31,147 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 127 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2024-11-13 13:30:31,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-13 13:30:31,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2024-11-13 13:30:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.205128205128205) internal successors, (47), 40 states have internal predecessors, (47), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-13 13:30:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2024-11-13 13:30:31,171 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 36 [2024-11-13 13:30:31,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:30:31,171 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2024-11-13 13:30:31,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 32 states have internal predecessors, (51), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 13:30:31,172 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2024-11-13 13:30:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 13:30:31,173 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:30:31,174 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:30:31,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 13:30:31,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:30:31,374 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:30:31,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:30:31,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1270808655, now seen corresponding path program 3 times [2024-11-13 13:30:31,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:30:31,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650860095] [2024-11-13 13:30:31,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:30:31,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:30:31,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:30:31,378 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:30:31,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 13:30:31,470 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 13:30:31,470 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:30:31,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 13:30:31,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:30:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 13:30:31,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:30:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 13:30:32,339 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:30:32,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650860095] [2024-11-13 13:30:32,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650860095] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:30:32,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:30:32,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2024-11-13 13:30:32,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135612463] [2024-11-13 13:30:32,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:30:32,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 13:30:32,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:30:32,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 13:30:32,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-13 13:30:32,342 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 13:30:32,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:30:32,885 INFO L93 Difference]: Finished difference Result 130 states and 178 transitions. [2024-11-13 13:30:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 13:30:32,886 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2024-11-13 13:30:32,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:30:32,887 INFO L225 Difference]: With dead ends: 130 [2024-11-13 13:30:32,888 INFO L226 Difference]: Without dead ends: 81 [2024-11-13 13:30:32,888 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-13 13:30:32,889 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 13:30:32,889 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 134 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 13:30:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-13 13:30:32,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2024-11-13 13:30:32,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 64 states have internal predecessors, (75), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2024-11-13 13:30:32,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2024-11-13 13:30:32,930 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 39 [2024-11-13 13:30:32,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:30:32,931 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2024-11-13 13:30:32,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 13:30:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2024-11-13 13:30:32,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 13:30:32,937 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:30:32,938 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:30:32,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 13:30:33,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:30:33,139 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:30:33,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:30:33,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1023121978, now seen corresponding path program 4 times [2024-11-13 13:30:33,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:30:33,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585790464] [2024-11-13 13:30:33,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 13:30:33,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:30:33,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:30:33,142 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:30:33,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 13:30:33,315 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 13:30:33,315 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:30:33,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 13:30:33,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:30:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 13:30:33,447 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:30:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-13 13:30:33,761 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:30:33,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585790464] [2024-11-13 13:30:33,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585790464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:30:33,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:30:33,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-13 13:30:33,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594617084] [2024-11-13 13:30:33,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:30:33,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 13:30:33,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:30:33,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 13:30:33,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-13 13:30:33,762 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 13:30:34,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:30:34,278 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2024-11-13 13:30:34,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 13:30:34,279 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2024-11-13 13:30:34,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:30:34,281 INFO L225 Difference]: With dead ends: 117 [2024-11-13 13:30:34,281 INFO L226 Difference]: Without dead ends: 64 [2024-11-13 13:30:34,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-13 13:30:34,282 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 13:30:34,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 99 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 13:30:34,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-13 13:30:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2024-11-13 13:30:34,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.2) internal successors, (48), 41 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-13 13:30:34,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-11-13 13:30:34,309 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 40 [2024-11-13 13:30:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:30:34,310 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-11-13 13:30:34,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 13:30:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-11-13 13:30:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 13:30:34,312 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:30:34,312 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:30:34,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 13:30:34,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:30:34,513 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:30:34,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:30:34,513 INFO L85 PathProgramCache]: Analyzing trace with hash -660529711, now seen corresponding path program 5 times [2024-11-13 13:30:34,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:30:34,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691367290] [2024-11-13 13:30:34,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 13:30:34,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:30:34,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:30:34,516 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:30:34,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 13:30:35,906 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-13 13:30:35,907 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:30:35,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-13 13:30:35,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:30:35,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-13 13:30:36,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:30:36,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 33 [2024-11-13 13:30:37,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:30:37,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 47 [2024-11-13 13:30:37,269 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:30:37,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2024-11-13 13:30:37,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:30:37,536 INFO L349 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2024-11-13 13:30:37,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 89 treesize of output 75 [2024-11-13 13:30:38,778 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 13:30:38,788 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:30:38,788 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 145 treesize of output 72 [2024-11-13 13:30:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 13:30:39,104 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:30:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 13:30:57,902 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:30:57,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691367290] [2024-11-13 13:30:57,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691367290] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:30:57,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:30:57,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 47 [2024-11-13 13:30:57,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197686324] [2024-11-13 13:30:57,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:30:57,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-13 13:30:57,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:30:57,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-13 13:30:57,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1959, Unknown=2, NotChecked=0, Total=2162 [2024-11-13 13:30:57,905 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 47 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 39 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 13:31:10,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:31:12,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:31:12,665 INFO L93 Difference]: Finished difference Result 92 states and 126 transitions. [2024-11-13 13:31:12,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-13 13:31:12,666 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 39 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2024-11-13 13:31:12,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:31:12,668 INFO L225 Difference]: With dead ends: 92 [2024-11-13 13:31:12,668 INFO L226 Difference]: Without dead ends: 64 [2024-11-13 13:31:12,669 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=403, Invalid=3885, Unknown=2, NotChecked=0, Total=4290 [2024-11-13 13:31:12,670 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 111 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-13 13:31:12,671 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 168 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-13 13:31:12,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-13 13:31:12,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2024-11-13 13:31:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-13 13:31:12,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2024-11-13 13:31:12,712 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 41 [2024-11-13 13:31:12,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:31:12,715 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2024-11-13 13:31:12,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 39 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 13:31:12,715 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2024-11-13 13:31:12,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 13:31:12,717 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:31:12,717 INFO L215 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:12,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 13:31:12,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:12,918 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:31:12,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:12,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1269126349, now seen corresponding path program 6 times [2024-11-13 13:31:12,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:31:12,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166417333] [2024-11-13 13:31:12,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 13:31:12,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:12,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:12,923 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:12,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 13:31:13,178 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-13 13:31:13,178 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:31:13,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 13:31:13,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 45 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 13:31:13,400 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:31:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 13:31:13,720 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:31:13,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166417333] [2024-11-13 13:31:13,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166417333] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:31:13,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:31:13,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2024-11-13 13:31:13,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798081837] [2024-11-13 13:31:13,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:31:13,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 13:31:13,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:31:13,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 13:31:13,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-11-13 13:31:13,722 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 13:31:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:31:14,229 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2024-11-13 13:31:14,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 13:31:14,230 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2024-11-13 13:31:14,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:31:14,231 INFO L225 Difference]: With dead ends: 84 [2024-11-13 13:31:14,232 INFO L226 Difference]: Without dead ends: 63 [2024-11-13 13:31:14,232 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2024-11-13 13:31:14,233 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 13:31:14,233 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 114 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 13:31:14,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-13 13:31:14,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2024-11-13 13:31:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 42 states have internal predecessors, (48), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 13:31:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2024-11-13 13:31:14,261 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 43 [2024-11-13 13:31:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:31:14,262 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2024-11-13 13:31:14,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 13:31:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2024-11-13 13:31:14,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 13:31:14,263 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:31:14,263 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:14,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 13:31:14,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:14,464 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:31:14,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:14,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1140111366, now seen corresponding path program 7 times [2024-11-13 13:31:14,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:31:14,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541936869] [2024-11-13 13:31:14,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 13:31:14,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:14,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:14,467 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:14,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 13:31:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:14,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 13:31:14,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 13:31:14,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:31:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:31:15,255 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:31:15,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541936869] [2024-11-13 13:31:15,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541936869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:31:15,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:31:15,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2024-11-13 13:31:15,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619893566] [2024-11-13 13:31:15,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:31:15,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 13:31:15,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:31:15,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 13:31:15,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-11-13 13:31:15,258 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 13:31:15,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:31:15,790 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2024-11-13 13:31:15,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 13:31:15,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2024-11-13 13:31:15,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:31:15,792 INFO L225 Difference]: With dead ends: 62 [2024-11-13 13:31:15,792 INFO L226 Difference]: Without dead ends: 33 [2024-11-13 13:31:15,792 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2024-11-13 13:31:15,793 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 13:31:15,793 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 13:31:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-13 13:31:15,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2024-11-13 13:31:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 13:31:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-13 13:31:15,814 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 44 [2024-11-13 13:31:15,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:31:15,814 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-13 13:31:15,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 13:31:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-13 13:31:15,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 13:31:15,815 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:31:15,815 INFO L215 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:15,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 13:31:16,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:16,016 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:31:16,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:16,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1734254049, now seen corresponding path program 8 times [2024-11-13 13:31:16,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:31:16,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190718070] [2024-11-13 13:31:16,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:31:16,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:16,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:16,020 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:16,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 13:31:16,160 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:31:16,160 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:31:16,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 13:31:16,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 41 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 13:31:16,304 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:31:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-13 13:31:16,849 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:31:16,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190718070] [2024-11-13 13:31:16,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190718070] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:31:16,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:31:16,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-13 13:31:16,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564933719] [2024-11-13 13:31:16,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:31:16,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 13:31:16,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:31:16,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 13:31:16,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-13 13:31:16,851 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 13:31:17,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:31:17,682 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2024-11-13 13:31:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 13:31:17,683 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2024-11-13 13:31:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:31:17,684 INFO L225 Difference]: With dead ends: 50 [2024-11-13 13:31:17,684 INFO L226 Difference]: Without dead ends: 36 [2024-11-13 13:31:17,685 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-11-13 13:31:17,686 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 13:31:17,686 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 133 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 13:31:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-13 13:31:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2024-11-13 13:31:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 13:31:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-13 13:31:17,714 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 44 [2024-11-13 13:31:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:31:17,715 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-13 13:31:17,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 13:31:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-13 13:31:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 13:31:17,716 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:31:17,717 INFO L215 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:17,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 13:31:17,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:17,918 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:31:17,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:17,919 INFO L85 PathProgramCache]: Analyzing trace with hash -406506052, now seen corresponding path program 9 times [2024-11-13 13:31:17,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:31:17,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234730149] [2024-11-13 13:31:17,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:31:17,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:17,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:17,922 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:17,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 13:31:18,040 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 13:31:18,040 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:31:18,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 13:31:18,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-13 13:31:18,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:31:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-13 13:31:19,042 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:31:19,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234730149] [2024-11-13 13:31:19,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234730149] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:31:19,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:31:19,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2024-11-13 13:31:19,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853600538] [2024-11-13 13:31:19,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:31:19,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 13:31:19,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:31:19,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 13:31:19,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2024-11-13 13:31:19,044 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 13:31:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:31:19,608 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2024-11-13 13:31:19,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 13:31:19,610 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 45 [2024-11-13 13:31:19,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:31:19,611 INFO L225 Difference]: With dead ends: 80 [2024-11-13 13:31:19,611 INFO L226 Difference]: Without dead ends: 53 [2024-11-13 13:31:19,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2024-11-13 13:31:19,612 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 13:31:19,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 139 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 13:31:19,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-13 13:31:19,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2024-11-13 13:31:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 13:31:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-11-13 13:31:19,640 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 45 [2024-11-13 13:31:19,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:31:19,640 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-11-13 13:31:19,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 13:31:19,640 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-11-13 13:31:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-13 13:31:19,641 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:31:19,641 INFO L215 NwaCegarLoop]: trace histogram [9, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:19,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 13:31:19,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:19,842 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:31:19,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:19,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1272579461, now seen corresponding path program 10 times [2024-11-13 13:31:19,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:31:19,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054407972] [2024-11-13 13:31:19,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 13:31:19,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:19,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:19,845 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:19,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 13:31:21,167 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 13:31:21,167 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:31:21,173 WARN L253 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-13 13:31:21,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:21,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 13:31:21,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 13:31:22,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:31:22,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 43 [2024-11-13 13:31:23,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:31:23,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 60 [2024-11-13 13:31:23,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:31:23,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 60 [2024-11-13 13:31:23,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:31:23,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 60 [2024-11-13 13:31:24,243 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 13:31:24,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:31:24,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:31:24,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:31:24,254 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:31:24,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 84 [2024-11-13 13:31:25,041 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 13:31:25,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:31:25,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:31:25,052 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:31:25,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 46 [2024-11-13 13:31:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 4 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 13:31:25,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:32:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 18 proven. 60 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 13:32:03,584 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:32:03,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054407972] [2024-11-13 13:32:03,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054407972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:32:03,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:32:03,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 27] total 58 [2024-11-13 13:32:03,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438485918] [2024-11-13 13:32:03,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:32:03,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-13 13:32:03,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:32:03,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-13 13:32:03,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=3026, Unknown=0, NotChecked=0, Total=3306 [2024-11-13 13:32:03,588 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 58 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 50 states have internal predecessors, (69), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 13:32:35,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:32:44,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:32:44,306 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2024-11-13 13:32:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-13 13:32:44,308 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 50 states have internal predecessors, (69), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2024-11-13 13:32:44,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:32:44,309 INFO L225 Difference]: With dead ends: 107 [2024-11-13 13:32:44,309 INFO L226 Difference]: Without dead ends: 76 [2024-11-13 13:32:44,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 61.1s TimeCoverageRelationStatistics Valid=602, Invalid=6707, Unknown=1, NotChecked=0, Total=7310 [2024-11-13 13:32:44,312 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 119 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2024-11-13 13:32:44,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 184 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1201 Invalid, 1 Unknown, 0 Unchecked, 16.8s Time] [2024-11-13 13:32:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-13 13:32:44,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2024-11-13 13:32:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-13 13:32:44,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2024-11-13 13:32:44,358 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 46 [2024-11-13 13:32:44,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:32:44,358 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2024-11-13 13:32:44,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 50 states have internal predecessors, (69), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 13:32:44,359 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2024-11-13 13:32:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 13:32:44,360 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:32:44,360 INFO L215 NwaCegarLoop]: trace histogram [10, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:32:44,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 13:32:44,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:32:44,561 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:32:44,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:32:44,562 INFO L85 PathProgramCache]: Analyzing trace with hash -97291744, now seen corresponding path program 11 times [2024-11-13 13:32:44,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:32:44,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290619496] [2024-11-13 13:32:44,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 13:32:44,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:32:44,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:32:44,565 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:32:44,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 13:32:45,170 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-13 13:32:45,170 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:32:45,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 13:32:45,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:32:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 49 proven. 32 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-13 13:32:45,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:32:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-13 13:32:46,050 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:32:46,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290619496] [2024-11-13 13:32:46,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290619496] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:32:46,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:32:46,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2024-11-13 13:32:46,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606271631] [2024-11-13 13:32:46,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:32:46,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 13:32:46,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:32:46,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 13:32:46,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-11-13 13:32:46,052 INFO L87 Difference]: Start difference. First operand 65 states and 85 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 13:32:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:32:47,519 INFO L93 Difference]: Finished difference Result 151 states and 199 transitions. [2024-11-13 13:32:47,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 13:32:47,520 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2024-11-13 13:32:47,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:32:47,522 INFO L225 Difference]: With dead ends: 151 [2024-11-13 13:32:47,522 INFO L226 Difference]: Without dead ends: 96 [2024-11-13 13:32:47,522 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 13:32:47,523 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 27 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 13:32:47,523 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 270 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 13:32:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-13 13:32:47,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2024-11-13 13:32:47,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 69 states have internal predecessors, (78), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-13 13:32:47,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 106 transitions. [2024-11-13 13:32:47,564 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 106 transitions. Word has length 48 [2024-11-13 13:32:47,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:32:47,564 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 106 transitions. [2024-11-13 13:32:47,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 13:32:47,565 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 106 transitions. [2024-11-13 13:32:47,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 13:32:47,565 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:32:47,565 INFO L215 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:32:47,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-13 13:32:47,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:32:47,766 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:32:47,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:32:47,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1603522033, now seen corresponding path program 12 times [2024-11-13 13:32:47,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:32:47,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317355490] [2024-11-13 13:32:47,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 13:32:47,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:32:47,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:32:47,768 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:32:47,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 13:32:47,920 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-13 13:32:47,920 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:32:47,924 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 13:32:47,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:32:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 60 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-13 13:32:48,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:32:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 56 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-13 13:32:49,252 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:32:49,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317355490] [2024-11-13 13:32:49,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317355490] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:32:49,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:32:49,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2024-11-13 13:32:49,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174336653] [2024-11-13 13:32:49,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:32:49,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 13:32:49,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:32:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 13:32:49,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2024-11-13 13:32:49,254 INFO L87 Difference]: Start difference. First operand 81 states and 106 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 13:32:51,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:32:51,061 INFO L93 Difference]: Finished difference Result 227 states and 303 transitions. [2024-11-13 13:32:51,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-13 13:32:51,062 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 49 [2024-11-13 13:32:51,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:32:51,063 INFO L225 Difference]: With dead ends: 227 [2024-11-13 13:32:51,063 INFO L226 Difference]: Without dead ends: 146 [2024-11-13 13:32:51,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 13:32:51,064 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 86 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 13:32:51,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 274 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 13:32:51,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-13 13:32:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2024-11-13 13:32:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 116 states have (on average 1.1896551724137931) internal successors, (138), 119 states have internal predecessors, (138), 14 states have call successors, (14), 5 states have call predecessors, (14), 7 states have return successors, (33), 13 states have call predecessors, (33), 14 states have call successors, (33) [2024-11-13 13:32:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 185 transitions. [2024-11-13 13:32:51,169 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 185 transitions. Word has length 49 [2024-11-13 13:32:51,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:32:51,170 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 185 transitions. [2024-11-13 13:32:51,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 13:32:51,170 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 185 transitions. [2024-11-13 13:32:51,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 13:32:51,172 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:32:51,172 INFO L215 NwaCegarLoop]: trace histogram [12, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:32:51,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 13:32:51,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:32:51,372 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:32:51,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:32:51,373 INFO L85 PathProgramCache]: Analyzing trace with hash 163156282, now seen corresponding path program 13 times [2024-11-13 13:32:51,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:32:51,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497567675] [2024-11-13 13:32:51,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 13:32:51,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:32:51,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:32:51,375 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:32:51,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 13:32:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:32:51,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 13:32:51,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:32:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 59 proven. 41 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-13 13:32:51,872 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:32:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-13 13:32:52,738 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:32:52,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497567675] [2024-11-13 13:32:52,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497567675] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:32:52,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:32:52,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2024-11-13 13:32:52,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915139811] [2024-11-13 13:32:52,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:32:52,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 13:32:52,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:32:52,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 13:32:52,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2024-11-13 13:32:52,739 INFO L87 Difference]: Start difference. First operand 138 states and 185 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 13:32:54,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:32:54,274 INFO L93 Difference]: Finished difference Result 222 states and 286 transitions. [2024-11-13 13:32:54,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-13 13:32:54,275 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2024-11-13 13:32:54,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:32:54,276 INFO L225 Difference]: With dead ends: 222 [2024-11-13 13:32:54,276 INFO L226 Difference]: Without dead ends: 131 [2024-11-13 13:32:54,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 13:32:54,278 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 107 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 13:32:54,278 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 129 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 13:32:54,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-13 13:32:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2024-11-13 13:32:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 88 states have internal predecessors, (102), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2024-11-13 13:32:54,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2024-11-13 13:32:54,329 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 50 [2024-11-13 13:32:54,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:32:54,329 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2024-11-13 13:32:54,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 13:32:54,330 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2024-11-13 13:32:54,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 13:32:54,330 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:32:54,331 INFO L215 NwaCegarLoop]: trace histogram [12, 5, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:32:54,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 13:32:54,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:32:54,531 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:32:54,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:32:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1215749393, now seen corresponding path program 14 times [2024-11-13 13:32:54,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:32:54,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040218123] [2024-11-13 13:32:54,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:32:54,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:32:54,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:32:54,534 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:32:54,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d942fe7e-5789-4c3e-a589-39c42f66a498/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 13:32:55,956 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:32:55,956 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:32:55,963 WARN L253 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-13 13:32:55,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:32:56,108 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 8 treesize of output 1 [2024-11-13 13:32:57,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:32:57,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 53 [2024-11-13 13:32:58,170 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:32:58,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 97 treesize of output 73 [2024-11-13 13:32:58,423 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:32:58,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 73 [2024-11-13 13:32:58,665 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:32:58,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 73 [2024-11-13 13:32:58,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:32:58,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 73 [2024-11-13 13:32:59,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:32:59,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:32:59,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:32:59,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:32:59,301 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 13:32:59,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:32:59,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 117 treesize of output 97 [2024-11-13 13:33:00,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:33:00,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:33:00,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:33:00,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:33:00,023 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 13:33:00,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:33:00,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 120 treesize of output 55 [2024-11-13 13:33:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 1 proven. 116 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 13:33:00,386 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:33:40,499 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:33:40,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2610 treesize of output 1 [2024-11-13 13:33:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 16 proven. 113 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 13:33:40,502 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:33:40,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040218123] [2024-11-13 13:33:40,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040218123] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:33:40,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:33:40,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 34] total 60 [2024-11-13 13:33:40,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062271429] [2024-11-13 13:33:40,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:33:40,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-13 13:33:40,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:33:40,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-13 13:33:40,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=3286, Unknown=1, NotChecked=0, Total=3540 [2024-11-13 13:33:40,505 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand has 60 states, 56 states have (on average 1.25) internal successors, (70), 53 states have internal predecessors, (70), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 13:34:12,345 WARN L286 SmtUtils]: Spent 30.26s on a formula simplification. DAG size of input: 222 DAG size of output: 211 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 13:35:47,872 WARN L286 SmtUtils]: Spent 1.38m on a formula simplification. DAG size of input: 348 DAG size of output: 333 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 13:35:52,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:35:56,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:00,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:02,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:05,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:10,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:15,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:19,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:23,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:26,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:29,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:30,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:32,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:36,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:38,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:42,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:46,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:51,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:36:53,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:36:59,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 13:37:26,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []