./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_15-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_15-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1 --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 d89b24ddcb39bc81f78fa19f2306b45fb625208ffa4463b75f31372afe08085d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 15:25:15,966 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 15:25:16,038 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 15:25:16,045 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 15:25:16,045 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 15:25:16,073 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 15:25:16,074 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 15:25:16,074 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 15:25:16,074 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 15:25:16,074 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 15:25:16,075 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 15:25:16,075 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 15:25:16,075 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 15:25:16,075 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 15:25:16,075 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 15:25:16,076 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 15:25:16,076 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 15:25:16,076 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 15:25:16,076 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 15:25:16,076 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 15:25:16,076 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 15:25:16,076 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 15:25:16,076 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 15:25:16,076 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 15:25:16,077 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 15:25:16,077 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 15:25:16,077 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 15:25:16,077 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 15:25:16,077 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 15:25:16,077 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 15:25:16,077 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 15:25:16,077 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 15:25:16,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:25:16,078 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 15:25:16,078 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 15:25:16,078 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 15:25:16,078 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 15:25:16,078 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:25:16,078 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 15:25:16,078 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 15:25:16,078 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 15:25:16,078 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 15:25:16,079 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 15:25:16,079 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 15:25:16,079 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 15:25:16,079 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 15:25:16,079 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 15:25:16,079 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 15:25:16,079 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_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1 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 -> d89b24ddcb39bc81f78fa19f2306b45fb625208ffa4463b75f31372afe08085d [2024-12-02 15:25:16,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 15:25:16,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 15:25:16,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 15:25:16,388 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 15:25:16,388 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 15:25:16,390 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/recursive-simple/fibo_2calls_15-2.c [2024-12-02 15:25:19,610 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/data/bc3532dc2/892d5c5558ab4056a45b277badd48908/FLAG2c1e3ae1b [2024-12-02 15:25:19,812 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 15:25:19,813 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/sv-benchmarks/c/recursive-simple/fibo_2calls_15-2.c [2024-12-02 15:25:19,819 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/data/bc3532dc2/892d5c5558ab4056a45b277badd48908/FLAG2c1e3ae1b [2024-12-02 15:25:19,834 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/data/bc3532dc2/892d5c5558ab4056a45b277badd48908 [2024-12-02 15:25:19,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 15:25:19,837 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 15:25:19,838 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 15:25:19,838 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 15:25:19,842 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 15:25:19,842 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:25:19" (1/1) ... [2024-12-02 15:25:19,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42798d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:25:19, skipping insertion in model container [2024-12-02 15:25:19,843 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:25:19" (1/1) ... [2024-12-02 15:25:19,857 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 15:25:20,036 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_bd414042-a6a9-4805-b449-f13767cec56c/sv-benchmarks/c/recursive-simple/fibo_2calls_15-2.c[950,963] [2024-12-02 15:25:20,040 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 15:25:20,052 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 15:25:20,068 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_bd414042-a6a9-4805-b449-f13767cec56c/sv-benchmarks/c/recursive-simple/fibo_2calls_15-2.c[950,963] [2024-12-02 15:25:20,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 15:25:20,085 INFO L204 MainTranslator]: Completed translation [2024-12-02 15:25:20,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:25:20 WrapperNode [2024-12-02 15:25:20,086 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 15:25:20,087 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 15:25:20,087 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 15:25:20,087 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 15:25:20,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:25:20" (1/1) ... [2024-12-02 15:25:20,101 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:25:20" (1/1) ... [2024-12-02 15:25:20,117 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-12-02 15:25:20,118 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 15:25:20,118 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 15:25:20,118 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 15:25:20,118 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 15:25:20,128 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:25:20" (1/1) ... [2024-12-02 15:25:20,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:25:20" (1/1) ... [2024-12-02 15:25:20,129 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:25:20" (1/1) ... [2024-12-02 15:25:20,139 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-12-02 15:25:20,140 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:25:20" (1/1) ... [2024-12-02 15:25:20,140 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:25:20" (1/1) ... [2024-12-02 15:25:20,142 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:25:20" (1/1) ... [2024-12-02 15:25:20,143 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:25:20" (1/1) ... [2024-12-02 15:25:20,145 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:25:20" (1/1) ... [2024-12-02 15:25:20,146 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:25:20" (1/1) ... [2024-12-02 15:25:20,147 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:25:20" (1/1) ... [2024-12-02 15:25:20,148 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 15:25:20,149 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 15:25:20,149 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 15:25:20,149 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 15:25:20,150 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:25:20" (1/1) ... [2024-12-02 15:25:20,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:25:20,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:25:20,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 15:25:20,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 15:25:20,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 15:25:20,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 15:25:20,210 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-12-02 15:25:20,210 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-12-02 15:25:20,210 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-12-02 15:25:20,210 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-12-02 15:25:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 15:25:20,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 15:25:20,268 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 15:25:20,270 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 15:25:20,399 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-12-02 15:25:20,400 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 15:25:20,411 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 15:25:20,411 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-12-02 15:25:20,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:25:20 BoogieIcfgContainer [2024-12-02 15:25:20,412 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 15:25:20,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 15:25:20,415 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 15:25:20,420 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 15:25:20,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:25:19" (1/3) ... [2024-12-02 15:25:20,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45169ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:25:20, skipping insertion in model container [2024-12-02 15:25:20,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:25:20" (2/3) ... [2024-12-02 15:25:20,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45169ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:25:20, skipping insertion in model container [2024-12-02 15:25:20,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:25:20" (3/3) ... [2024-12-02 15:25:20,423 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_15-2.c [2024-12-02 15:25:20,441 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 15:25:20,443 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_15-2.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-12-02 15:25:20,504 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 15:25:20,518 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;@4416d8da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 15:25:20,519 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-02 15:25:20,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-12-02 15:25:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-12-02 15:25:20,531 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:20,532 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:25:20,532 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:20,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:20,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2024-12-02 15:25:20,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:20,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871668745] [2024-12-02 15:25:20,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:25:20,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:25:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:25:20,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:20,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871668745] [2024-12-02 15:25:20,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871668745] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:25:20,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:25:20,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 15:25:20,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826116072] [2024-12-02 15:25:20,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:25:20,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 15:25:20,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:25:20,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 15:25:20,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 15:25:20,786 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 15:25:20,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:25:20,876 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2024-12-02 15:25:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 15:25:20,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-12-02 15:25:20,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:25:20,886 INFO L225 Difference]: With dead ends: 41 [2024-12-02 15:25:20,887 INFO L226 Difference]: Without dead ends: 29 [2024-12-02 15:25:20,889 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 15:25:20,892 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:25:20,893 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:25:20,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-12-02 15:25:20,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-12-02 15:25:20,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-12-02 15:25:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-12-02 15:25:20,924 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2024-12-02 15:25:20,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:25:20,924 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-12-02 15:25:20,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 15:25:20,925 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-12-02 15:25:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-02 15:25:20,926 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:20,926 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:25:20,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 15:25:20,926 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:20,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:20,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2024-12-02 15:25:20,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:20,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317921535] [2024-12-02 15:25:20,927 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:25:20,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:25:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:25:21,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:21,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317921535] [2024-12-02 15:25:21,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317921535] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:25:21,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:25:21,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 15:25:21,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027763112] [2024-12-02 15:25:21,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:25:21,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 15:25:21,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:25:21,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 15:25:21,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 15:25:21,014 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 15:25:21,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:25:21,090 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-12-02 15:25:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 15:25:21,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-12-02 15:25:21,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:25:21,092 INFO L225 Difference]: With dead ends: 33 [2024-12-02 15:25:21,093 INFO L226 Difference]: Without dead ends: 29 [2024-12-02 15:25:21,093 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 15:25:21,094 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:25:21,094 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:25:21,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-12-02 15:25:21,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-12-02 15:25:21,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-12-02 15:25:21,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-12-02 15:25:21,103 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2024-12-02 15:25:21,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:25:21,104 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-12-02 15:25:21,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 15:25:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-12-02 15:25:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-12-02 15:25:21,105 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:21,106 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:25:21,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 15:25:21,106 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:21,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:21,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2024-12-02 15:25:21,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:21,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175162355] [2024-12-02 15:25:21,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:25:21,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:25:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 15:25:21,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:21,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175162355] [2024-12-02 15:25:21,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175162355] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:25:21,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447681676] [2024-12-02 15:25:21,245 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:25:21,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:21,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:25:21,248 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:25:21,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 15:25:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:25:21,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 15:25:21,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:25:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 15:25:21,422 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:25:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 15:25:21,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447681676] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:25:21,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:25:21,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-12-02 15:25:21,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896831468] [2024-12-02 15:25:21,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:25:21,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 15:25:21,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:25:21,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 15:25:21,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-12-02 15:25:21,680 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-12-02 15:25:21,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:25:21,857 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2024-12-02 15:25:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 15:25:21,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2024-12-02 15:25:21,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:25:21,859 INFO L225 Difference]: With dead ends: 55 [2024-12-02 15:25:21,859 INFO L226 Difference]: Without dead ends: 31 [2024-12-02 15:25:21,859 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-12-02 15:25:21,860 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:25:21,861 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 118 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:25:21,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-12-02 15:25:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-12-02 15:25:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-12-02 15:25:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-12-02 15:25:21,871 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2024-12-02 15:25:21,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:25:21,871 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-12-02 15:25:21,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-12-02 15:25:21,871 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-12-02 15:25:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-12-02 15:25:21,873 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:21,873 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:25:21,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 15:25:22,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:22,074 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:22,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:22,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2024-12-02 15:25:22,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:22,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531879964] [2024-12-02 15:25:22,075 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:25:22,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:25:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 15:25:22,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:22,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531879964] [2024-12-02 15:25:22,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531879964] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:25:22,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723975742] [2024-12-02 15:25:22,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:25:22,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:22,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:25:22,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:25:22,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 15:25:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:25:22,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 15:25:22,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:25:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 15:25:22,278 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:25:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 15:25:22,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723975742] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:25:22,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:25:22,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-12-02 15:25:22,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458026706] [2024-12-02 15:25:22,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:25:22,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 15:25:22,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:25:22,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 15:25:22,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-12-02 15:25:22,496 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-12-02 15:25:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:25:22,658 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-12-02 15:25:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 15:25:22,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2024-12-02 15:25:22,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:25:22,660 INFO L225 Difference]: With dead ends: 40 [2024-12-02 15:25:22,660 INFO L226 Difference]: Without dead ends: 36 [2024-12-02 15:25:22,661 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-12-02 15:25:22,661 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:25:22,662 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 123 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:25:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-12-02 15:25:22,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2024-12-02 15:25:22,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2024-12-02 15:25:22,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-12-02 15:25:22,670 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2024-12-02 15:25:22,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:25:22,671 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-12-02 15:25:22,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-12-02 15:25:22,671 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-12-02 15:25:22,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-12-02 15:25:22,672 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:22,672 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2024-12-02 15:25:22,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 15:25:22,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:22,873 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:22,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:22,873 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2024-12-02 15:25:22,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:22,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799221305] [2024-12-02 15:25:22,874 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:25:22,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:25:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 15:25:22,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:22,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799221305] [2024-12-02 15:25:22,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799221305] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:25:22,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235941725] [2024-12-02 15:25:22,983 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:25:22,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:22,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:25:22,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:25:22,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 15:25:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:25:23,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 15:25:23,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:25:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 15:25:23,128 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:25:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 15:25:23,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235941725] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:25:23,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:25:23,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2024-12-02 15:25:23,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734561917] [2024-12-02 15:25:23,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:25:23,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 15:25:23,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:25:23,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 15:25:23,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-12-02 15:25:23,539 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-02 15:25:23,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:25:23,737 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2024-12-02 15:25:23,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 15:25:23,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2024-12-02 15:25:23,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:25:23,739 INFO L225 Difference]: With dead ends: 69 [2024-12-02 15:25:23,740 INFO L226 Difference]: Without dead ends: 38 [2024-12-02 15:25:23,740 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-12-02 15:25:23,741 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:25:23,742 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 146 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:25:23,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-12-02 15:25:23,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-12-02 15:25:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2024-12-02 15:25:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-12-02 15:25:23,752 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2024-12-02 15:25:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:25:23,752 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-12-02 15:25:23,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-02 15:25:23,752 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2024-12-02 15:25:23,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-12-02 15:25:23,754 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:23,754 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2024-12-02 15:25:23,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 15:25:23,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:23,954 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:23,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:23,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2024-12-02 15:25:23,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:23,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637260957] [2024-12-02 15:25:23,955 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:25:23,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:25:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 15:25:24,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:24,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637260957] [2024-12-02 15:25:24,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637260957] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:25:24,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257678479] [2024-12-02 15:25:24,104 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:25:24,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:24,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:25:24,106 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:25:24,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 15:25:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:25:24,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 15:25:24,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:25:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 15:25:24,256 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:25:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 15:25:24,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257678479] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:25:24,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:25:24,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2024-12-02 15:25:24,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663698477] [2024-12-02 15:25:24,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:25:24,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 15:25:24,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:25:24,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 15:25:24,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-12-02 15:25:24,660 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-02 15:25:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:25:25,126 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2024-12-02 15:25:25,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 15:25:25,127 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2024-12-02 15:25:25,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:25:25,128 INFO L225 Difference]: With dead ends: 101 [2024-12-02 15:25:25,129 INFO L226 Difference]: Without dead ends: 68 [2024-12-02 15:25:25,130 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2024-12-02 15:25:25,130 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 15:25:25,130 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 303 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 15:25:25,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-12-02 15:25:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2024-12-02 15:25:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2024-12-02 15:25:25,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2024-12-02 15:25:25,146 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2024-12-02 15:25:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:25:25,146 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2024-12-02 15:25:25,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-02 15:25:25,147 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2024-12-02 15:25:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-12-02 15:25:25,149 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:25,149 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:25:25,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 15:25:25,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:25,350 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:25,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:25,350 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2024-12-02 15:25:25,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:25,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020748504] [2024-12-02 15:25:25,351 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:25:25,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:25:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-12-02 15:25:25,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:25,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020748504] [2024-12-02 15:25:25,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020748504] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:25:25,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321958786] [2024-12-02 15:25:25,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:25:25,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:25,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:25:25,487 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:25:25,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 15:25:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:25:25,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 15:25:25,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:25:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-12-02 15:25:25,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:25:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-02 15:25:26,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321958786] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:25:26,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:25:26,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2024-12-02 15:25:26,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123820635] [2024-12-02 15:25:26,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:25:26,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 15:25:26,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:25:26,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 15:25:26,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-12-02 15:25:26,224 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-12-02 15:25:26,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:25:26,456 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2024-12-02 15:25:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 15:25:26,456 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 51 [2024-12-02 15:25:26,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:25:26,458 INFO L225 Difference]: With dead ends: 102 [2024-12-02 15:25:26,458 INFO L226 Difference]: Without dead ends: 98 [2024-12-02 15:25:26,458 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-12-02 15:25:26,459 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 15:25:26,459 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 164 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 15:25:26,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-12-02 15:25:26,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2024-12-02 15:25:26,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2024-12-02 15:25:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2024-12-02 15:25:26,482 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2024-12-02 15:25:26,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:25:26,482 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2024-12-02 15:25:26,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-12-02 15:25:26,483 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2024-12-02 15:25:26,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-12-02 15:25:26,487 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:26,487 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:25:26,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 15:25:26,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:26,688 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:26,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:26,688 INFO L85 PathProgramCache]: Analyzing trace with hash -586612948, now seen corresponding path program 1 times [2024-12-02 15:25:26,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:26,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514350039] [2024-12-02 15:25:26,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:25:26,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:25:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 59 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-12-02 15:25:26,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:26,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514350039] [2024-12-02 15:25:26,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514350039] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:25:26,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328072657] [2024-12-02 15:25:26,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:25:26,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:26,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:25:26,923 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:25:26,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 15:25:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:25:27,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 15:25:27,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:25:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-12-02 15:25:27,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:25:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 102 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-12-02 15:25:28,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328072657] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:25:28,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:25:28,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2024-12-02 15:25:28,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188523802] [2024-12-02 15:25:28,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:25:28,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 15:25:28,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:25:28,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 15:25:28,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-12-02 15:25:28,061 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2024-12-02 15:25:28,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:25:28,718 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2024-12-02 15:25:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-12-02 15:25:28,718 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) Word has length 93 [2024-12-02 15:25:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:25:28,721 INFO L225 Difference]: With dead ends: 177 [2024-12-02 15:25:28,721 INFO L226 Difference]: Without dead ends: 104 [2024-12-02 15:25:28,723 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 15:25:28,724 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 96 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 15:25:28,724 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 325 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 15:25:28,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-12-02 15:25:28,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2024-12-02 15:25:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 16 states have call successors, (16), 8 states have call predecessors, (16), 14 states have return successors, (43), 20 states have call predecessors, (43), 16 states have call successors, (43) [2024-12-02 15:25:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2024-12-02 15:25:28,745 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 93 [2024-12-02 15:25:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:25:28,746 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2024-12-02 15:25:28,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2024-12-02 15:25:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2024-12-02 15:25:28,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-12-02 15:25:28,749 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:28,749 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 10, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:25:28,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 15:25:28,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-12-02 15:25:28,950 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:28,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:28,951 INFO L85 PathProgramCache]: Analyzing trace with hash 437944761, now seen corresponding path program 2 times [2024-12-02 15:25:28,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:28,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195979079] [2024-12-02 15:25:28,951 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:25:28,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:28,990 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:25:28,990 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:25:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 43 proven. 179 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2024-12-02 15:25:29,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:29,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195979079] [2024-12-02 15:25:29,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195979079] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:25:29,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093377110] [2024-12-02 15:25:29,293 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:25:29,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:29,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:25:29,295 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:25:29,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 15:25:29,410 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:25:29,410 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:25:29,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 15:25:29,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:25:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 30 proven. 244 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2024-12-02 15:25:29,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:25:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 30 proven. 260 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-12-02 15:25:30,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093377110] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:25:30,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:25:30,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2024-12-02 15:25:30,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838031824] [2024-12-02 15:25:30,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:25:30,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 15:25:30,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:25:30,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 15:25:30,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-12-02 15:25:30,908 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-12-02 15:25:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:25:31,211 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2024-12-02 15:25:31,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 15:25:31,211 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 159 [2024-12-02 15:25:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:25:31,214 INFO L225 Difference]: With dead ends: 132 [2024-12-02 15:25:31,214 INFO L226 Difference]: Without dead ends: 128 [2024-12-02 15:25:31,215 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 302 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2024-12-02 15:25:31,215 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 70 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 15:25:31,216 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 196 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 15:25:31,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-12-02 15:25:31,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2024-12-02 15:25:31,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 21 states have call successors, (21), 8 states have call predecessors, (21), 19 states have return successors, (85), 30 states have call predecessors, (85), 21 states have call successors, (85) [2024-12-02 15:25:31,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2024-12-02 15:25:31,241 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 159 [2024-12-02 15:25:31,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:25:31,242 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2024-12-02 15:25:31,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-12-02 15:25:31,242 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2024-12-02 15:25:31,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2024-12-02 15:25:31,254 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:31,254 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 18, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:25:31,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 15:25:31,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-12-02 15:25:31,455 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:31,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:31,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1279109938, now seen corresponding path program 2 times [2024-12-02 15:25:31,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:31,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868821848] [2024-12-02 15:25:31,456 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:25:31,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:31,502 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:25:31,502 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:25:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 158 proven. 490 refuted. 0 times theorem prover too weak. 1585 trivial. 0 not checked. [2024-12-02 15:25:31,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:31,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868821848] [2024-12-02 15:25:31,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868821848] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:25:31,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545405356] [2024-12-02 15:25:31,920 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:25:31,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:31,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:25:31,922 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:25:31,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 15:25:32,087 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:25:32,087 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:25:32,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 15:25:32,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:25:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 569 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2024-12-02 15:25:32,284 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:25:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 593 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2024-12-02 15:25:34,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545405356] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:25:34,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:25:34,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17] total 29 [2024-12-02 15:25:34,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385683174] [2024-12-02 15:25:34,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:25:34,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 15:25:34,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:25:34,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 15:25:34,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-12-02 15:25:34,485 INFO L87 Difference]: Start difference. First operand 118 states and 194 transitions. Second operand has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) [2024-12-02 15:25:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:25:35,425 INFO L93 Difference]: Finished difference Result 323 states and 666 transitions. [2024-12-02 15:25:35,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-12-02 15:25:35,426 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) Word has length 284 [2024-12-02 15:25:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:25:35,429 INFO L225 Difference]: With dead ends: 323 [2024-12-02 15:25:35,429 INFO L226 Difference]: Without dead ends: 214 [2024-12-02 15:25:35,430 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 547 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2024-12-02 15:25:35,431 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 158 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 15:25:35,431 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 449 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 15:25:35,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-12-02 15:25:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 184. [2024-12-02 15:25:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 35 states have call successors, (35), 17 states have call predecessors, (35), 25 states have return successors, (120), 43 states have call predecessors, (120), 35 states have call successors, (120) [2024-12-02 15:25:35,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 301 transitions. [2024-12-02 15:25:35,464 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 301 transitions. Word has length 284 [2024-12-02 15:25:35,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:25:35,465 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 301 transitions. [2024-12-02 15:25:35,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) [2024-12-02 15:25:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 301 transitions. [2024-12-02 15:25:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2024-12-02 15:25:35,475 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:35,475 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 25, 25, 24, 19, 16, 16, 16, 16, 16, 16, 16, 12, 12, 12, 12, 12, 12, 12, 12, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:25:35,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 15:25:35,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:35,676 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:35,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:35,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1695767594, now seen corresponding path program 3 times [2024-12-02 15:25:35,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:35,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251443114] [2024-12-02 15:25:35,677 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:25:35,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:35,701 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 15:25:35,702 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:25:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 515 proven. 4 refuted. 0 times theorem prover too weak. 3856 trivial. 0 not checked. [2024-12-02 15:25:35,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:35,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251443114] [2024-12-02 15:25:35,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251443114] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:25:35,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800939525] [2024-12-02 15:25:35,808 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:25:35,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:35,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:25:35,810 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:25:35,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 15:25:35,956 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 15:25:35,956 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:25:35,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 15:25:35,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:25:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 760 proven. 6 refuted. 0 times theorem prover too weak. 3609 trivial. 0 not checked. [2024-12-02 15:25:36,046 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:25:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 619 proven. 12 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2024-12-02 15:25:37,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800939525] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:25:37,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:25:37,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-12-02 15:25:37,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104166271] [2024-12-02 15:25:37,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:25:37,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 15:25:37,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:25:37,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 15:25:37,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-12-02 15:25:37,274 INFO L87 Difference]: Start difference. First operand 184 states and 301 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2024-12-02 15:25:37,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:25:37,410 INFO L93 Difference]: Finished difference Result 360 states and 621 transitions. [2024-12-02 15:25:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 15:25:37,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) Word has length 389 [2024-12-02 15:25:37,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:25:37,413 INFO L225 Difference]: With dead ends: 360 [2024-12-02 15:25:37,413 INFO L226 Difference]: Without dead ends: 181 [2024-12-02 15:25:37,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 767 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-12-02 15:25:37,415 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:25:37,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 152 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:25:37,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-12-02 15:25:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2024-12-02 15:25:37,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 116 states have internal predecessors, (138), 33 states have call successors, (33), 18 states have call predecessors, (33), 22 states have return successors, (95), 39 states have call predecessors, (95), 33 states have call successors, (95) [2024-12-02 15:25:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 266 transitions. [2024-12-02 15:25:37,428 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 266 transitions. Word has length 389 [2024-12-02 15:25:37,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:25:37,428 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 266 transitions. [2024-12-02 15:25:37,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2024-12-02 15:25:37,429 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 266 transitions. [2024-12-02 15:25:37,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2024-12-02 15:25:37,431 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:37,431 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 29, 29, 28, 27, 19, 19, 19, 19, 19, 19, 19, 14, 14, 14, 14, 14, 14, 14, 14, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:25:37,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 15:25:37,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:37,631 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:37,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:37,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1299493047, now seen corresponding path program 4 times [2024-12-02 15:25:37,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:37,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297408436] [2024-12-02 15:25:37,632 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:25:37,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:37,674 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:25:37,674 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:25:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6213 backedges. 196 proven. 801 refuted. 0 times theorem prover too weak. 5216 trivial. 0 not checked. [2024-12-02 15:25:37,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:37,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297408436] [2024-12-02 15:25:37,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297408436] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:25:37,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587518626] [2024-12-02 15:25:37,999 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:25:37,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:37,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:25:38,001 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:25:38,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 15:25:38,214 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:25:38,214 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:25:38,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 15:25:38,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:25:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6213 backedges. 1477 proven. 19 refuted. 0 times theorem prover too weak. 4717 trivial. 0 not checked. [2024-12-02 15:25:38,297 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:25:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6213 backedges. 196 proven. 927 refuted. 0 times theorem prover too weak. 5090 trivial. 0 not checked. [2024-12-02 15:25:39,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587518626] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:25:39,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:25:39,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 17 [2024-12-02 15:25:39,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645097000] [2024-12-02 15:25:39,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:25:39,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 15:25:39,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:25:39,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 15:25:39,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-12-02 15:25:39,993 INFO L87 Difference]: Start difference. First operand 174 states and 266 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) [2024-12-02 15:25:40,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:25:40,198 INFO L93 Difference]: Finished difference Result 327 states and 532 transitions. [2024-12-02 15:25:40,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 15:25:40,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) Word has length 461 [2024-12-02 15:25:40,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:25:40,202 INFO L225 Difference]: With dead ends: 327 [2024-12-02 15:25:40,202 INFO L226 Difference]: Without dead ends: 139 [2024-12-02 15:25:40,204 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 937 GetRequests, 911 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2024-12-02 15:25:40,204 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 21 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:25:40,205 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:25:40,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-12-02 15:25:40,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-12-02 15:25:40,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 96 states have (on average 1.1666666666666667) internal successors, (112), 95 states have internal predecessors, (112), 24 states have call successors, (24), 16 states have call predecessors, (24), 18 states have return successors, (67), 27 states have call predecessors, (67), 24 states have call successors, (67) [2024-12-02 15:25:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 203 transitions. [2024-12-02 15:25:40,223 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 203 transitions. Word has length 461 [2024-12-02 15:25:40,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:25:40,223 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 203 transitions. [2024-12-02 15:25:40,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) [2024-12-02 15:25:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 203 transitions. [2024-12-02 15:25:40,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2024-12-02 15:25:40,227 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:40,227 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 27, 27, 24, 24, 16, 16, 16, 16, 16, 16, 16, 13, 13, 13, 13, 13, 13, 13, 11, 8, 8, 3, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:25:40,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-12-02 15:25:40,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:40,428 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:40,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:40,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1298209125, now seen corresponding path program 5 times [2024-12-02 15:25:40,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:40,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850585043] [2024-12-02 15:25:40,429 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:25:40,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:40,459 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 15:25:40,459 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:25:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 261 proven. 727 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2024-12-02 15:25:40,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:40,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850585043] [2024-12-02 15:25:40,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850585043] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:25:40,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234298079] [2024-12-02 15:25:40,597 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:25:40,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:40,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:25:40,599 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:25:40,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 15:25:40,755 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 15:25:40,756 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:25:40,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 15:25:40,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:25:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 1710 proven. 31 refuted. 0 times theorem prover too weak. 2991 trivial. 0 not checked. [2024-12-02 15:25:40,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:25:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 261 proven. 727 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2024-12-02 15:25:42,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234298079] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:25:42,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:25:42,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2024-12-02 15:25:42,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156252206] [2024-12-02 15:25:42,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:25:42,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-02 15:25:42,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:25:42,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-02 15:25:42,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-12-02 15:25:42,220 INFO L87 Difference]: Start difference. First operand 139 states and 203 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 8 states have call successors, (22), 2 states have call predecessors, (22), 6 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) [2024-12-02 15:25:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:25:42,483 INFO L93 Difference]: Finished difference Result 283 states and 449 transitions. [2024-12-02 15:25:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 15:25:42,484 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 8 states have call successors, (22), 2 states have call predecessors, (22), 6 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) Word has length 406 [2024-12-02 15:25:42,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:25:42,486 INFO L225 Difference]: With dead ends: 283 [2024-12-02 15:25:42,486 INFO L226 Difference]: Without dead ends: 146 [2024-12-02 15:25:42,487 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 803 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2024-12-02 15:25:42,487 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:25:42,487 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 164 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:25:42,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-12-02 15:25:42,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2024-12-02 15:25:42,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 96 states have (on average 1.15625) internal successors, (111), 95 states have internal predecessors, (111), 24 states have call successors, (24), 16 states have call predecessors, (24), 18 states have return successors, (74), 27 states have call predecessors, (74), 24 states have call successors, (74) [2024-12-02 15:25:42,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 209 transitions. [2024-12-02 15:25:42,515 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 209 transitions. Word has length 406 [2024-12-02 15:25:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:25:42,515 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 209 transitions. [2024-12-02 15:25:42,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 8 states have call successors, (22), 2 states have call predecessors, (22), 6 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) [2024-12-02 15:25:42,516 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 209 transitions. [2024-12-02 15:25:42,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2024-12-02 15:25:42,520 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:42,520 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 33, 33, 29, 28, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 12, 10, 10, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:25:42,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 15:25:42,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:42,721 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:42,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:42,721 INFO L85 PathProgramCache]: Analyzing trace with hash -821151567, now seen corresponding path program 6 times [2024-12-02 15:25:42,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:42,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863625955] [2024-12-02 15:25:42,722 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 15:25:42,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:42,820 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-12-02 15:25:42,821 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:25:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6872 backedges. 258 proven. 808 refuted. 0 times theorem prover too weak. 5806 trivial. 0 not checked. [2024-12-02 15:25:43,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:43,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863625955] [2024-12-02 15:25:43,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863625955] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:25:43,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481844393] [2024-12-02 15:25:43,182 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 15:25:43,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:43,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:25:43,185 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:25:43,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 15:25:43,449 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-12-02 15:25:43,449 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:25:43,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 15:25:43,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:25:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6872 backedges. 258 proven. 808 refuted. 0 times theorem prover too weak. 5806 trivial. 0 not checked. [2024-12-02 15:25:43,544 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:25:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6872 backedges. 260 proven. 822 refuted. 0 times theorem prover too weak. 5790 trivial. 0 not checked. [2024-12-02 15:25:45,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481844393] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:25:45,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:25:45,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 18 [2024-12-02 15:25:45,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001111471] [2024-12-02 15:25:45,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:25:45,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 15:25:45,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:25:45,535 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 15:25:45,535 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-12-02 15:25:45,535 INFO L87 Difference]: Start difference. First operand 139 states and 209 transitions. Second operand has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 14 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 9 states have call predecessors, (22), 14 states have call successors, (22) [2024-12-02 15:25:45,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:25:45,717 INFO L93 Difference]: Finished difference Result 164 states and 262 transitions. [2024-12-02 15:25:45,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 15:25:45,718 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 14 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 9 states have call predecessors, (22), 14 states have call successors, (22) Word has length 487 [2024-12-02 15:25:45,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:25:45,722 INFO L225 Difference]: With dead ends: 164 [2024-12-02 15:25:45,722 INFO L226 Difference]: Without dead ends: 160 [2024-12-02 15:25:45,723 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 965 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2024-12-02 15:25:45,724 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:25:45,724 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 144 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:25:45,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-12-02 15:25:45,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 152. [2024-12-02 15:25:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 104 states have (on average 1.1442307692307692) internal successors, (119), 103 states have internal predecessors, (119), 26 states have call successors, (26), 16 states have call predecessors, (26), 21 states have return successors, (95), 32 states have call predecessors, (95), 26 states have call successors, (95) [2024-12-02 15:25:45,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 240 transitions. [2024-12-02 15:25:45,748 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 240 transitions. Word has length 487 [2024-12-02 15:25:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:25:45,748 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 240 transitions. [2024-12-02 15:25:45,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 14 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 9 states have call predecessors, (22), 14 states have call successors, (22) [2024-12-02 15:25:45,749 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 240 transitions. [2024-12-02 15:25:45,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2024-12-02 15:25:45,754 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:45,754 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 37, 37, 33, 32, 21, 21, 21, 21, 21, 21, 21, 18, 18, 18, 18, 18, 18, 18, 14, 12, 10, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:25:45,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-12-02 15:25:45,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:45,955 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:45,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:45,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2115855979, now seen corresponding path program 7 times [2024-12-02 15:25:45,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:45,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205130653] [2024-12-02 15:25:45,956 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:25:45,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:25:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8584 backedges. 183 proven. 1400 refuted. 0 times theorem prover too weak. 7001 trivial. 0 not checked. [2024-12-02 15:25:46,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:46,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205130653] [2024-12-02 15:25:46,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205130653] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:25:46,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242080782] [2024-12-02 15:25:46,766 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:25:46,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:46,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:25:46,768 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:25:46,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 15:25:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:25:47,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 15:25:47,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:25:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8584 backedges. 183 proven. 1400 refuted. 0 times theorem prover too weak. 7001 trivial. 0 not checked. [2024-12-02 15:25:47,216 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:25:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8584 backedges. 183 proven. 1433 refuted. 0 times theorem prover too weak. 6968 trivial. 0 not checked. [2024-12-02 15:25:50,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242080782] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:25:50,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:25:50,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 22 [2024-12-02 15:25:50,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787049595] [2024-12-02 15:25:50,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:25:50,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 15:25:50,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:25:50,487 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 15:25:50,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-12-02 15:25:50,487 INFO L87 Difference]: Start difference. First operand 152 states and 240 transitions. Second operand has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2024-12-02 15:25:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:25:50,759 INFO L93 Difference]: Finished difference Result 176 states and 302 transitions. [2024-12-02 15:25:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 15:25:50,759 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) Word has length 543 [2024-12-02 15:25:50,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:25:50,764 INFO L225 Difference]: With dead ends: 176 [2024-12-02 15:25:50,764 INFO L226 Difference]: Without dead ends: 172 [2024-12-02 15:25:50,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 1075 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2024-12-02 15:25:50,765 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 15:25:50,765 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 216 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 15:25:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-12-02 15:25:50,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 161. [2024-12-02 15:25:50,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 109 states have (on average 1.1376146788990826) internal successors, (124), 108 states have internal predecessors, (124), 29 states have call successors, (29), 16 states have call predecessors, (29), 22 states have return successors, (114), 36 states have call predecessors, (114), 29 states have call successors, (114) [2024-12-02 15:25:50,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 267 transitions. [2024-12-02 15:25:50,789 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 267 transitions. Word has length 543 [2024-12-02 15:25:50,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:25:50,790 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 267 transitions. [2024-12-02 15:25:50,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2024-12-02 15:25:50,791 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 267 transitions. [2024-12-02 15:25:50,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2024-12-02 15:25:50,799 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:50,799 INFO L218 NwaCegarLoop]: trace histogram [62, 62, 57, 57, 53, 50, 31, 31, 31, 31, 31, 31, 31, 28, 28, 28, 28, 28, 28, 28, 22, 22, 12, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:25:50,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 15:25:50,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-12-02 15:25:51,000 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:51,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:51,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1664136535, now seen corresponding path program 8 times [2024-12-02 15:25:51,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:51,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082483939] [2024-12-02 15:25:51,000 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:25:51,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:51,118 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:25:51,118 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:25:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 19923 backedges. 416 proven. 1760 refuted. 0 times theorem prover too weak. 17747 trivial. 0 not checked. [2024-12-02 15:25:52,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:52,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082483939] [2024-12-02 15:25:52,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082483939] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:25:52,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947695761] [2024-12-02 15:25:52,301 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:25:52,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:52,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:25:52,303 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:25:52,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 15:25:52,698 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:25:52,698 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:25:52,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 15:25:52,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:25:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 19923 backedges. 300 proven. 2484 refuted. 0 times theorem prover too weak. 17139 trivial. 0 not checked. [2024-12-02 15:25:52,872 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:25:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 19923 backedges. 300 proven. 2528 refuted. 0 times theorem prover too weak. 17095 trivial. 0 not checked. [2024-12-02 15:25:57,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947695761] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:25:57,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:25:57,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 21] total 28 [2024-12-02 15:25:57,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194051256] [2024-12-02 15:25:57,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:25:57,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 15:25:57,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:25:57,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 15:25:57,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2024-12-02 15:25:57,668 INFO L87 Difference]: Start difference. First operand 161 states and 267 transitions. Second operand has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) [2024-12-02 15:25:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:25:58,059 INFO L93 Difference]: Finished difference Result 217 states and 460 transitions. [2024-12-02 15:25:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 15:25:58,059 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) Word has length 821 [2024-12-02 15:25:58,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:25:58,063 INFO L225 Difference]: With dead ends: 217 [2024-12-02 15:25:58,063 INFO L226 Difference]: Without dead ends: 213 [2024-12-02 15:25:58,064 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1669 GetRequests, 1622 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 15:25:58,065 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 112 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 15:25:58,065 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 217 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 15:25:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-12-02 15:25:58,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2024-12-02 15:25:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 112 states have internal predecessors, (128), 29 states have call successors, (29), 16 states have call predecessors, (29), 24 states have return successors, (127), 38 states have call predecessors, (127), 29 states have call successors, (127) [2024-12-02 15:25:58,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 284 transitions. [2024-12-02 15:25:58,098 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 284 transitions. Word has length 821 [2024-12-02 15:25:58,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:25:58,099 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 284 transitions. [2024-12-02 15:25:58,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) [2024-12-02 15:25:58,099 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 284 transitions. [2024-12-02 15:25:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1742 [2024-12-02 15:25:58,144 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:25:58,145 INFO L218 NwaCegarLoop]: trace histogram [138, 138, 117, 117, 105, 102, 69, 69, 69, 69, 69, 69, 69, 58, 58, 58, 58, 58, 58, 58, 44, 36, 36, 12, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:25:58,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 15:25:58,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 15:25:58,346 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:25:58,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:25:58,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1583821801, now seen corresponding path program 9 times [2024-12-02 15:25:58,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:25:58,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997870125] [2024-12-02 15:25:58,347 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:25:58,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:25:58,442 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 15:25:58,442 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:25:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 91563 backedges. 2857 proven. 2 refuted. 0 times theorem prover too weak. 88704 trivial. 0 not checked. [2024-12-02 15:25:58,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:25:58,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997870125] [2024-12-02 15:25:58,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997870125] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:25:58,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53717920] [2024-12-02 15:25:58,524 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:25:58,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:25:58,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:25:58,526 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:25:58,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 15:25:58,917 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 15:25:58,917 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:25:58,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 15:25:58,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:25:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 91563 backedges. 2855 proven. 4 refuted. 0 times theorem prover too weak. 88704 trivial. 0 not checked. [2024-12-02 15:25:59,015 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:26:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 91563 backedges. 2855 proven. 4 refuted. 0 times theorem prover too weak. 88704 trivial. 0 not checked. [2024-12-02 15:26:03,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53717920] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:26:03,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:26:03,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2024-12-02 15:26:03,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745643636] [2024-12-02 15:26:03,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:26:03,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 15:26:03,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:26:03,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 15:26:03,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-12-02 15:26:03,455 INFO L87 Difference]: Start difference. First operand 167 states and 284 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2024-12-02 15:26:03,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:26:03,556 INFO L93 Difference]: Finished difference Result 327 states and 637 transitions. [2024-12-02 15:26:03,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 15:26:03,557 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 1741 [2024-12-02 15:26:03,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:26:03,559 INFO L225 Difference]: With dead ends: 327 [2024-12-02 15:26:03,559 INFO L226 Difference]: Without dead ends: 166 [2024-12-02 15:26:03,561 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3491 GetRequests, 3476 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2024-12-02 15:26:03,561 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:26:03,561 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 158 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:26:03,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-12-02 15:26:03,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2024-12-02 15:26:03,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 111 states have internal predecessors, (128), 29 states have call successors, (29), 17 states have call predecessors, (29), 23 states have return successors, (122), 37 states have call predecessors, (122), 29 states have call successors, (122) [2024-12-02 15:26:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 279 transitions. [2024-12-02 15:26:03,586 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 279 transitions. Word has length 1741 [2024-12-02 15:26:03,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:26:03,587 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 279 transitions. [2024-12-02 15:26:03,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2024-12-02 15:26:03,587 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 279 transitions. [2024-12-02 15:26:03,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1324 [2024-12-02 15:26:03,605 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:26:03,605 INFO L218 NwaCegarLoop]: trace histogram [110, 110, 85, 85, 76, 73, 55, 55, 55, 55, 55, 55, 55, 42, 42, 42, 42, 42, 42, 42, 34, 34, 18, 12, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:26:03,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 15:26:03,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 15:26:03,806 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:26:03,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:26:03,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1266320509, now seen corresponding path program 10 times [2024-12-02 15:26:03,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:26:03,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312783082] [2024-12-02 15:26:03,807 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:26:03,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:26:03,972 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:26:03,973 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:26:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 53122 backedges. 683 proven. 3768 refuted. 0 times theorem prover too weak. 48671 trivial. 0 not checked. [2024-12-02 15:26:05,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:26:05,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312783082] [2024-12-02 15:26:05,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312783082] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:26:05,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313321491] [2024-12-02 15:26:05,026 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:26:05,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:26:05,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:26:05,028 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:26:05,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 15:26:05,488 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:26:05,488 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:26:05,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 2350 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 15:26:05,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:26:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 53122 backedges. 7729 proven. 68 refuted. 0 times theorem prover too weak. 45325 trivial. 0 not checked. [2024-12-02 15:26:05,593 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:26:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 53122 backedges. 686 proven. 4153 refuted. 0 times theorem prover too weak. 48283 trivial. 0 not checked. [2024-12-02 15:26:10,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313321491] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:26:10,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:26:10,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 22 [2024-12-02 15:26:10,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561236674] [2024-12-02 15:26:10,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:26:10,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 15:26:10,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:26:10,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 15:26:10,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-12-02 15:26:10,223 INFO L87 Difference]: Start difference. First operand 166 states and 279 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) [2024-12-02 15:26:10,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:26:10,585 INFO L93 Difference]: Finished difference Result 334 states and 658 transitions. [2024-12-02 15:26:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 15:26:10,585 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) Word has length 1323 [2024-12-02 15:26:10,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:26:10,588 INFO L225 Difference]: With dead ends: 334 [2024-12-02 15:26:10,588 INFO L226 Difference]: Without dead ends: 174 [2024-12-02 15:26:10,590 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2671 GetRequests, 2632 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2024-12-02 15:26:10,590 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 15:26:10,590 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 305 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 15:26:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-12-02 15:26:10,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2024-12-02 15:26:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 121 states have (on average 1.1239669421487604) internal successors, (136), 116 states have internal predecessors, (136), 29 states have call successors, (29), 20 states have call predecessors, (29), 23 states have return successors, (116), 37 states have call predecessors, (116), 29 states have call successors, (116) [2024-12-02 15:26:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 281 transitions. [2024-12-02 15:26:10,605 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 281 transitions. Word has length 1323 [2024-12-02 15:26:10,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:26:10,605 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 281 transitions. [2024-12-02 15:26:10,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) [2024-12-02 15:26:10,606 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 281 transitions. [2024-12-02 15:26:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2226 [2024-12-02 15:26:10,631 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:26:10,631 INFO L218 NwaCegarLoop]: trace histogram [165, 165, 162, 162, 131, 128, 82, 82, 82, 82, 82, 82, 82, 81, 81, 81, 81, 81, 81, 81, 50, 46, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:26:10,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 15:26:10,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-02 15:26:10,832 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:26:10,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:26:10,832 INFO L85 PathProgramCache]: Analyzing trace with hash -383489943, now seen corresponding path program 11 times [2024-12-02 15:26:10,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:26:10,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98295801] [2024-12-02 15:26:10,832 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:26:10,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:26:10,882 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-12-02 15:26:10,882 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:26:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 149171 backedges. 1455 proven. 5257 refuted. 0 times theorem prover too weak. 142459 trivial. 0 not checked. [2024-12-02 15:26:11,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:26:11,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98295801] [2024-12-02 15:26:11,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98295801] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:26:11,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33331611] [2024-12-02 15:26:11,012 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:26:11,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:26:11,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:26:11,014 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:26:11,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 15:26:11,414 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-12-02 15:26:11,414 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:26:11,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 15:26:11,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:26:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 149171 backedges. 21675 proven. 21 refuted. 0 times theorem prover too weak. 127475 trivial. 0 not checked. [2024-12-02 15:26:11,582 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:26:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 149171 backedges. 1493 proven. 5817 refuted. 0 times theorem prover too weak. 141861 trivial. 0 not checked. [2024-12-02 15:26:18,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33331611] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:26:18,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:26:18,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2024-12-02 15:26:18,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290743686] [2024-12-02 15:26:18,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:26:18,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 15:26:18,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:26:18,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 15:26:18,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-12-02 15:26:18,150 INFO L87 Difference]: Start difference. First operand 174 states and 281 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (24), 6 states have call predecessors, (24), 10 states have call successors, (24) [2024-12-02 15:26:18,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:26:18,435 INFO L93 Difference]: Finished difference Result 342 states and 616 transitions. [2024-12-02 15:26:18,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 15:26:18,436 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (24), 6 states have call predecessors, (24), 10 states have call successors, (24) Word has length 2225 [2024-12-02 15:26:18,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:26:18,438 INFO L225 Difference]: With dead ends: 342 [2024-12-02 15:26:18,438 INFO L226 Difference]: Without dead ends: 171 [2024-12-02 15:26:18,440 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4470 GetRequests, 4437 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2024-12-02 15:26:18,440 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 15:26:18,440 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 178 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 15:26:18,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-12-02 15:26:18,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 166. [2024-12-02 15:26:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 115 states have (on average 1.1217391304347826) internal successors, (129), 111 states have internal predecessors, (129), 28 states have call successors, (28), 19 states have call predecessors, (28), 22 states have return successors, (104), 35 states have call predecessors, (104), 28 states have call successors, (104) [2024-12-02 15:26:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 261 transitions. [2024-12-02 15:26:18,456 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 261 transitions. Word has length 2225 [2024-12-02 15:26:18,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:26:18,456 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 261 transitions. [2024-12-02 15:26:18,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (24), 6 states have call predecessors, (24), 10 states have call successors, (24) [2024-12-02 15:26:18,457 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 261 transitions. [2024-12-02 15:26:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1291 [2024-12-02 15:26:18,466 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:26:18,466 INFO L218 NwaCegarLoop]: trace histogram [97, 97, 92, 92, 79, 73, 48, 48, 48, 48, 48, 48, 48, 46, 46, 46, 46, 46, 46, 46, 33, 25, 19, 18, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:26:18,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 15:26:18,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:26:18,667 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:26:18,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:26:18,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1187552520, now seen corresponding path program 12 times [2024-12-02 15:26:18,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:26:18,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892743243] [2024-12-02 15:26:18,668 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 15:26:18,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:26:18,740 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-12-02 15:26:18,740 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:26:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 49729 backedges. 3182 proven. 67 refuted. 0 times theorem prover too weak. 46480 trivial. 0 not checked. [2024-12-02 15:26:19,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:26:19,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892743243] [2024-12-02 15:26:19,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892743243] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:26:19,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686229564] [2024-12-02 15:26:19,081 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 15:26:19,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:26:19,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:26:19,083 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:26:19,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 15:26:19,571 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-12-02 15:26:19,571 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:26:19,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 15:26:19,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:26:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 49729 backedges. 3520 proven. 78 refuted. 0 times theorem prover too weak. 46131 trivial. 0 not checked. [2024-12-02 15:26:19,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:26:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49729 backedges. 3520 proven. 83 refuted. 0 times theorem prover too weak. 46126 trivial. 0 not checked. [2024-12-02 15:26:23,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686229564] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:26:23,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:26:23,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 23 [2024-12-02 15:26:23,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342103172] [2024-12-02 15:26:23,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:26:23,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 15:26:23,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:26:23,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 15:26:23,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-12-02 15:26:23,659 INFO L87 Difference]: Start difference. First operand 166 states and 261 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 12 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2024-12-02 15:26:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:26:24,007 INFO L93 Difference]: Finished difference Result 331 states and 563 transitions. [2024-12-02 15:26:24,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 15:26:24,008 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 12 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) Word has length 1290 [2024-12-02 15:26:24,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:26:24,011 INFO L225 Difference]: With dead ends: 331 [2024-12-02 15:26:24,011 INFO L226 Difference]: Without dead ends: 172 [2024-12-02 15:26:24,012 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2603 GetRequests, 2565 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2024-12-02 15:26:24,013 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 15:26:24,013 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 286 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 15:26:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-12-02 15:26:24,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 166. [2024-12-02 15:26:24,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 111 states have internal predecessors, (127), 28 states have call successors, (28), 21 states have call predecessors, (28), 21 states have return successors, (95), 33 states have call predecessors, (95), 28 states have call successors, (95) [2024-12-02 15:26:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 250 transitions. [2024-12-02 15:26:24,038 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 250 transitions. Word has length 1290 [2024-12-02 15:26:24,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:26:24,040 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 250 transitions. [2024-12-02 15:26:24,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 12 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2024-12-02 15:26:24,040 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 250 transitions. [2024-12-02 15:26:24,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3317 [2024-12-02 15:26:24,104 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:26:24,104 INFO L218 NwaCegarLoop]: trace histogram [255, 255, 232, 232, 205, 185, 127, 127, 127, 127, 127, 127, 127, 116, 116, 116, 116, 116, 116, 116, 89, 58, 50, 47, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:26:24,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 15:26:24,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:26:24,305 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:26:24,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:26:24,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1060460513, now seen corresponding path program 13 times [2024-12-02 15:26:24,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:26:24,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310193892] [2024-12-02 15:26:24,307 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:26:24,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:26:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:26:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 333338 backedges. 1458 proven. 11873 refuted. 0 times theorem prover too weak. 320007 trivial. 0 not checked. [2024-12-02 15:26:37,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:26:37,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310193892] [2024-12-02 15:26:37,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310193892] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:26:37,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531648616] [2024-12-02 15:26:37,387 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:26:37,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:26:37,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:26:37,388 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:26:37,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 15:26:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:26:38,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 7382 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 15:26:38,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:26:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 333338 backedges. 1458 proven. 11873 refuted. 0 times theorem prover too weak. 320007 trivial. 0 not checked. [2024-12-02 15:26:38,760 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:26:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 333338 backedges. 1458 proven. 11929 refuted. 0 times theorem prover too weak. 319951 trivial. 0 not checked. [2024-12-02 15:26:52,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531648616] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:26:52,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:26:52,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 23] total 26 [2024-12-02 15:26:52,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622454128] [2024-12-02 15:26:52,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:26:52,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 15:26:52,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:26:52,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 15:26:52,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2024-12-02 15:26:52,061 INFO L87 Difference]: Start difference. First operand 166 states and 250 transitions. Second operand has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) [2024-12-02 15:26:52,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:26:52,384 INFO L93 Difference]: Finished difference Result 226 states and 454 transitions. [2024-12-02 15:26:52,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 15:26:52,385 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) Word has length 3316 [2024-12-02 15:26:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:26:52,389 INFO L225 Difference]: With dead ends: 226 [2024-12-02 15:26:52,389 INFO L226 Difference]: Without dead ends: 222 [2024-12-02 15:26:52,390 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6662 GetRequests, 6619 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2024-12-02 15:26:52,390 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 111 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 15:26:52,390 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 221 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 15:26:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-12-02 15:26:52,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 183. [2024-12-02 15:26:52,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 126 states have (on average 1.0873015873015872) internal successors, (137), 121 states have internal predecessors, (137), 32 states have call successors, (32), 21 states have call predecessors, (32), 24 states have return successors, (132), 40 states have call predecessors, (132), 32 states have call successors, (132) [2024-12-02 15:26:52,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 301 transitions. [2024-12-02 15:26:52,416 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 301 transitions. Word has length 3316 [2024-12-02 15:26:52,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:26:52,418 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 301 transitions. [2024-12-02 15:26:52,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) [2024-12-02 15:26:52,419 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 301 transitions. [2024-12-02 15:26:52,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2014 [2024-12-02 15:26:52,466 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:26:52,467 INFO L218 NwaCegarLoop]: trace histogram [150, 150, 145, 145, 120, 119, 75, 75, 75, 75, 75, 75, 75, 72, 72, 72, 72, 72, 72, 72, 48, 44, 30, 26, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:26:52,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 15:26:52,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:26:52,667 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:26:52,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:26:52,669 INFO L85 PathProgramCache]: Analyzing trace with hash 827582761, now seen corresponding path program 14 times [2024-12-02 15:26:52,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:26:52,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945871209] [2024-12-02 15:26:52,669 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:26:52,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:26:53,027 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:26:53,028 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:26:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 121945 backedges. 1434 proven. 5744 refuted. 0 times theorem prover too weak. 114767 trivial. 0 not checked. [2024-12-02 15:26:57,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:26:57,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945871209] [2024-12-02 15:26:57,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945871209] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:26:57,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346281675] [2024-12-02 15:26:57,223 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:26:57,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:26:57,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:26:57,225 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:26:57,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 15:26:58,061 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:26:58,061 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:26:58,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 4488 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-02 15:26:58,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:26:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 121945 backedges. 932 proven. 7848 refuted. 0 times theorem prover too weak. 113165 trivial. 0 not checked. [2024-12-02 15:26:58,282 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:27:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 121945 backedges. 932 proven. 7918 refuted. 0 times theorem prover too weak. 113095 trivial. 0 not checked. [2024-12-02 15:27:08,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346281675] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:27:08,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:27:08,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 25] total 32 [2024-12-02 15:27:08,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127653517] [2024-12-02 15:27:08,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:27:08,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-12-02 15:27:08,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:27:08,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-12-02 15:27:08,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2024-12-02 15:27:08,792 INFO L87 Difference]: Start difference. First operand 183 states and 301 transitions. Second operand has 32 states, 30 states have (on average 3.5) internal successors, (105), 32 states have internal predecessors, (105), 28 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (45), 17 states have call predecessors, (45), 28 states have call successors, (45) [2024-12-02 15:27:09,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:27:09,270 INFO L93 Difference]: Finished difference Result 246 states and 569 transitions. [2024-12-02 15:27:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 15:27:09,271 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.5) internal successors, (105), 32 states have internal predecessors, (105), 28 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (45), 17 states have call predecessors, (45), 28 states have call successors, (45) Word has length 2013 [2024-12-02 15:27:09,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:27:09,278 INFO L225 Difference]: With dead ends: 246 [2024-12-02 15:27:09,278 INFO L226 Difference]: Without dead ends: 242 [2024-12-02 15:27:09,279 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4059 GetRequests, 4004 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=381, Invalid=1689, Unknown=0, NotChecked=0, Total=2070 [2024-12-02 15:27:09,280 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 15:27:09,280 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 244 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 15:27:09,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2024-12-02 15:27:09,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 176. [2024-12-02 15:27:09,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 122 states have (on average 1.0901639344262295) internal successors, (133), 117 states have internal predecessors, (133), 30 states have call successors, (30), 21 states have call predecessors, (30), 23 states have return successors, (123), 37 states have call predecessors, (123), 30 states have call successors, (123) [2024-12-02 15:27:09,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 286 transitions. [2024-12-02 15:27:09,304 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 286 transitions. Word has length 2013 [2024-12-02 15:27:09,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:27:09,305 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 286 transitions. [2024-12-02 15:27:09,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.5) internal successors, (105), 32 states have internal predecessors, (105), 28 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (45), 17 states have call predecessors, (45), 28 states have call successors, (45) [2024-12-02 15:27:09,305 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 286 transitions. [2024-12-02 15:27:09,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5556 [2024-12-02 15:27:09,514 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:27:09,515 INFO L218 NwaCegarLoop]: trace histogram [441, 441, 374, 374, 341, 320, 220, 220, 220, 220, 220, 220, 220, 187, 187, 187, 187, 187, 187, 187, 154, 100, 100, 54, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:27:09,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 15:27:09,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-12-02 15:27:09,715 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:27:09,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:27:09,718 INFO L85 PathProgramCache]: Analyzing trace with hash 350710185, now seen corresponding path program 15 times [2024-12-02 15:27:09,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:27:09,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620093906] [2024-12-02 15:27:09,718 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:27:09,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:27:09,877 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-12-02 15:27:09,878 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:27:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 942018 backedges. 17834 proven. 307 refuted. 0 times theorem prover too weak. 923877 trivial. 0 not checked. [2024-12-02 15:27:10,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:27:10,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620093906] [2024-12-02 15:27:10,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620093906] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:27:10,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106812685] [2024-12-02 15:27:10,165 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:27:10,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:27:10,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:27:10,167 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:27:10,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 15:27:10,953 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-12-02 15:27:10,953 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:27:10,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 15:27:10,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:27:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 942018 backedges. 37893 proven. 157 refuted. 0 times theorem prover too weak. 903968 trivial. 0 not checked. [2024-12-02 15:27:11,193 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:27:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 942018 backedges. 17834 proven. 310 refuted. 0 times theorem prover too weak. 923874 trivial. 0 not checked. [2024-12-02 15:27:28,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106812685] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:27:28,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:27:28,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 19 [2024-12-02 15:27:28,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839199599] [2024-12-02 15:27:28,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:27:28,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 15:27:28,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:27:28,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 15:27:28,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-12-02 15:27:28,978 INFO L87 Difference]: Start difference. First operand 176 states and 286 transitions. Second operand has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 19 states have internal predecessors, (88), 11 states have call successors, (27), 2 states have call predecessors, (27), 8 states have return successors, (31), 15 states have call predecessors, (31), 11 states have call successors, (31) [2024-12-02 15:27:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:27:29,444 INFO L93 Difference]: Finished difference Result 390 states and 703 transitions. [2024-12-02 15:27:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-12-02 15:27:29,445 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 19 states have internal predecessors, (88), 11 states have call successors, (27), 2 states have call predecessors, (27), 8 states have return successors, (31), 15 states have call predecessors, (31), 11 states have call successors, (31) Word has length 5555 [2024-12-02 15:27:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:27:29,447 INFO L225 Difference]: With dead ends: 390 [2024-12-02 15:27:29,448 INFO L226 Difference]: Without dead ends: 196 [2024-12-02 15:27:29,449 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11139 GetRequests, 11099 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=966, Unknown=0, NotChecked=0, Total=1190 [2024-12-02 15:27:29,449 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 55 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 15:27:29,449 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 296 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 15:27:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-12-02 15:27:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 185. [2024-12-02 15:27:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 128 states have (on average 1.0859375) internal successors, (139), 123 states have internal predecessors, (139), 32 states have call successors, (32), 22 states have call predecessors, (32), 24 states have return successors, (132), 39 states have call predecessors, (132), 32 states have call successors, (132) [2024-12-02 15:27:29,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 303 transitions. [2024-12-02 15:27:29,467 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 303 transitions. Word has length 5555 [2024-12-02 15:27:29,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:27:29,468 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 303 transitions. [2024-12-02 15:27:29,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 19 states have internal predecessors, (88), 11 states have call successors, (27), 2 states have call predecessors, (27), 8 states have return successors, (31), 15 states have call predecessors, (31), 11 states have call successors, (31) [2024-12-02 15:27:29,468 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 303 transitions. [2024-12-02 15:27:29,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3253 [2024-12-02 15:27:29,572 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:27:29,573 INFO L218 NwaCegarLoop]: trace histogram [241, 241, 236, 236, 195, 191, 120, 120, 120, 120, 120, 120, 120, 118, 118, 118, 118, 118, 118, 118, 75, 73, 50, 41, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:27:29,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 15:27:29,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-12-02 15:27:29,773 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:27:29,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:27:29,775 INFO L85 PathProgramCache]: Analyzing trace with hash -835056070, now seen corresponding path program 16 times [2024-12-02 15:27:29,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:27:29,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082366625] [2024-12-02 15:27:29,775 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:27:29,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:27:30,400 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:27:30,400 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:27:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 319832 backedges. 2356 proven. 16088 refuted. 0 times theorem prover too weak. 301388 trivial. 0 not checked. [2024-12-02 15:27:40,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:27:40,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082366625] [2024-12-02 15:27:40,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082366625] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:27:40,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061146833] [2024-12-02 15:27:40,952 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:27:40,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:27:40,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:27:40,954 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:27:40,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 15:27:42,005 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:27:42,006 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:27:42,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 5785 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 15:27:42,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:27:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 319832 backedges. 70060 proven. 926 refuted. 0 times theorem prover too weak. 248846 trivial. 0 not checked. [2024-12-02 15:27:42,215 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:27:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 319832 backedges. 2350 proven. 16987 refuted. 0 times theorem prover too weak. 300495 trivial. 0 not checked. [2024-12-02 15:27:56,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061146833] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:27:56,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:27:56,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 27] total 34 [2024-12-02 15:27:56,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724768778] [2024-12-02 15:27:56,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:27:56,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-12-02 15:27:56,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:27:56,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-12-02 15:27:56,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2024-12-02 15:27:56,210 INFO L87 Difference]: Start difference. First operand 185 states and 303 transitions. Second operand has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 28 states have call successors, (38), 2 states have call predecessors, (38), 14 states have return successors, (47), 14 states have call predecessors, (47), 28 states have call successors, (47) [2024-12-02 15:27:57,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:27:57,241 INFO L93 Difference]: Finished difference Result 411 states and 785 transitions. [2024-12-02 15:27:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-12-02 15:27:57,241 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 28 states have call successors, (38), 2 states have call predecessors, (38), 14 states have return successors, (47), 14 states have call predecessors, (47), 28 states have call successors, (47) Word has length 3252 [2024-12-02 15:27:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:27:57,245 INFO L225 Difference]: With dead ends: 411 [2024-12-02 15:27:57,245 INFO L226 Difference]: Without dead ends: 225 [2024-12-02 15:27:57,248 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6556 GetRequests, 6484 SyntacticMatches, 13 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=559, Invalid=3101, Unknown=0, NotChecked=0, Total=3660 [2024-12-02 15:27:57,249 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 99 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-12-02 15:27:57,249 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 604 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-12-02 15:27:57,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-12-02 15:27:57,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 195. [2024-12-02 15:27:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 135 states have (on average 1.0666666666666667) internal successors, (144), 130 states have internal predecessors, (144), 35 states have call successors, (35), 24 states have call predecessors, (35), 24 states have return successors, (130), 40 states have call predecessors, (130), 35 states have call successors, (130) [2024-12-02 15:27:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 309 transitions. [2024-12-02 15:27:57,282 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 309 transitions. Word has length 3252 [2024-12-02 15:27:57,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:27:57,283 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 309 transitions. [2024-12-02 15:27:57,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 28 states have call successors, (38), 2 states have call predecessors, (38), 14 states have return successors, (47), 14 states have call predecessors, (47), 28 states have call successors, (47) [2024-12-02 15:27:57,284 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 309 transitions. [2024-12-02 15:27:57,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5200 [2024-12-02 15:27:57,487 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:27:57,489 INFO L218 NwaCegarLoop]: trace histogram [382, 382, 381, 381, 314, 303, 191, 191, 191, 191, 191, 191, 191, 190, 190, 190, 190, 190, 190, 190, 124, 112, 78, 68, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:27:57,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 15:27:57,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-12-02 15:27:57,689 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:27:57,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:27:57,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1221500653, now seen corresponding path program 17 times [2024-12-02 15:27:57,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:27:57,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684517029] [2024-12-02 15:27:57,691 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:27:57,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:27:57,899 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2024-12-02 15:27:57,899 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:27:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 819938 backedges. 6637 proven. 24961 refuted. 0 times theorem prover too weak. 788340 trivial. 0 not checked. [2024-12-02 15:27:59,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:27:59,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684517029] [2024-12-02 15:27:59,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684517029] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:27:59,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335691740] [2024-12-02 15:27:59,169 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:27:59,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:27:59,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:27:59,170 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:27:59,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 15:28:00,112 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2024-12-02 15:28:00,112 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:28:00,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 1574 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-12-02 15:28:00,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:28:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 819938 backedges. 298486 proven. 1897 refuted. 0 times theorem prover too weak. 519555 trivial. 0 not checked. [2024-12-02 15:28:00,412 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:28:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 819938 backedges. 7231 proven. 27965 refuted. 0 times theorem prover too weak. 784742 trivial. 0 not checked. [2024-12-02 15:28:23,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335691740] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:28:23,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:28:23,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 31] total 40 [2024-12-02 15:28:23,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336891505] [2024-12-02 15:28:23,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:28:23,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-12-02 15:28:23,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:28:23,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-12-02 15:28:23,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 15:28:23,653 INFO L87 Difference]: Start difference. First operand 195 states and 309 transitions. Second operand has 40 states, 39 states have (on average 3.641025641025641) internal successors, (142), 40 states have internal predecessors, (142), 34 states have call successors, (44), 2 states have call predecessors, (44), 17 states have return successors, (57), 17 states have call predecessors, (57), 34 states have call successors, (57) [2024-12-02 15:28:25,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:28:25,013 INFO L93 Difference]: Finished difference Result 474 states and 943 transitions. [2024-12-02 15:28:25,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-12-02 15:28:25,014 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.641025641025641) internal successors, (142), 40 states have internal predecessors, (142), 34 states have call successors, (44), 2 states have call predecessors, (44), 17 states have return successors, (57), 17 states have call predecessors, (57), 34 states have call successors, (57) Word has length 5199 [2024-12-02 15:28:25,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:28:25,018 INFO L225 Difference]: With dead ends: 474 [2024-12-02 15:28:25,018 INFO L226 Difference]: Without dead ends: 281 [2024-12-02 15:28:25,020 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10465 GetRequests, 10372 SyntacticMatches, 15 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=933, Invalid=5387, Unknown=0, NotChecked=0, Total=6320 [2024-12-02 15:28:25,020 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 173 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 15:28:25,021 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 636 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 15:28:25,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2024-12-02 15:28:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 234. [2024-12-02 15:28:25,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 163 states have (on average 1.0552147239263803) internal successors, (172), 157 states have internal predecessors, (172), 44 states have call successors, (44), 31 states have call predecessors, (44), 26 states have return successors, (181), 45 states have call predecessors, (181), 44 states have call successors, (181) [2024-12-02 15:28:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 397 transitions. [2024-12-02 15:28:25,047 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 397 transitions. Word has length 5199 [2024-12-02 15:28:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:28:25,048 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 397 transitions. [2024-12-02 15:28:25,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.641025641025641) internal successors, (142), 40 states have internal predecessors, (142), 34 states have call successors, (44), 2 states have call predecessors, (44), 17 states have return successors, (57), 17 states have call predecessors, (57), 34 states have call successors, (57) [2024-12-02 15:28:25,048 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 397 transitions. [2024-12-02 15:28:25,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5145 [2024-12-02 15:28:25,228 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:28:25,229 INFO L218 NwaCegarLoop]: trace histogram [386, 386, 369, 369, 307, 303, 193, 193, 193, 193, 193, 193, 193, 184, 184, 184, 184, 184, 184, 184, 123, 110, 79, 66, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:28:25,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-12-02 15:28:25,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-12-02 15:28:25,429 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:28:25,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:28:25,432 INFO L85 PathProgramCache]: Analyzing trace with hash -337277973, now seen corresponding path program 18 times [2024-12-02 15:28:25,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:28:25,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064474208] [2024-12-02 15:28:25,432 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 15:28:25,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:28:25,574 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2024-12-02 15:28:25,575 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:28:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 802984 backedges. 3846 proven. 21023 refuted. 0 times theorem prover too weak. 778115 trivial. 0 not checked. [2024-12-02 15:28:26,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:28:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064474208] [2024-12-02 15:28:26,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064474208] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:28:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538247103] [2024-12-02 15:28:26,118 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 15:28:26,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:28:26,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:28:26,119 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:28:26,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-02 15:28:27,052 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2024-12-02 15:28:27,052 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:28:27,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 15:28:27,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:28:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 802984 backedges. 3870 proven. 21295 refuted. 0 times theorem prover too weak. 777819 trivial. 0 not checked. [2024-12-02 15:28:27,316 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:28:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 802984 backedges. 3876 proven. 21374 refuted. 0 times theorem prover too weak. 777734 trivial. 0 not checked. [2024-12-02 15:28:49,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538247103] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:28:49,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:28:49,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 27] total 31 [2024-12-02 15:28:49,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40832655] [2024-12-02 15:28:49,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:28:49,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-12-02 15:28:49,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:28:49,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-12-02 15:28:49,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2024-12-02 15:28:49,307 INFO L87 Difference]: Start difference. First operand 234 states and 397 transitions. Second operand has 31 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 31 states have internal predecessors, (103), 26 states have call successors, (32), 1 states have call predecessors, (32), 14 states have return successors, (42), 16 states have call predecessors, (42), 26 states have call successors, (42) [2024-12-02 15:28:49,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:28:49,703 INFO L93 Difference]: Finished difference Result 277 states and 576 transitions. [2024-12-02 15:28:49,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 15:28:49,704 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 31 states have internal predecessors, (103), 26 states have call successors, (32), 1 states have call predecessors, (32), 14 states have return successors, (42), 16 states have call predecessors, (42), 26 states have call successors, (42) Word has length 5144 [2024-12-02 15:28:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:28:49,710 INFO L225 Difference]: With dead ends: 277 [2024-12-02 15:28:49,710 INFO L226 Difference]: Without dead ends: 273 [2024-12-02 15:28:49,711 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10324 GetRequests, 10272 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=316, Invalid=1406, Unknown=0, NotChecked=0, Total=1722 [2024-12-02 15:28:49,711 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 15:28:49,711 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 342 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 15:28:49,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2024-12-02 15:28:49,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 234. [2024-12-02 15:28:49,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 163 states have (on average 1.0552147239263803) internal successors, (172), 157 states have internal predecessors, (172), 44 states have call successors, (44), 31 states have call predecessors, (44), 26 states have return successors, (181), 45 states have call predecessors, (181), 44 states have call successors, (181) [2024-12-02 15:28:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 397 transitions. [2024-12-02 15:28:49,736 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 397 transitions. Word has length 5144 [2024-12-02 15:28:49,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:28:49,738 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 397 transitions. [2024-12-02 15:28:49,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 31 states have internal predecessors, (103), 26 states have call successors, (32), 1 states have call predecessors, (32), 14 states have return successors, (42), 16 states have call predecessors, (42), 26 states have call successors, (42) [2024-12-02 15:28:49,738 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 397 transitions. [2024-12-02 15:28:49,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5012 [2024-12-02 15:28:49,888 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:28:49,889 INFO L218 NwaCegarLoop]: trace histogram [386, 386, 349, 349, 310, 287, 193, 193, 193, 193, 193, 193, 193, 174, 174, 174, 174, 174, 174, 174, 136, 94, 76, 62, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:28:49,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-12-02 15:28:50,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-12-02 15:28:50,090 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:28:50,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:28:50,092 INFO L85 PathProgramCache]: Analyzing trace with hash -871679251, now seen corresponding path program 19 times [2024-12-02 15:28:50,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:28:50,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063095570] [2024-12-02 15:28:50,093 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:28:50,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:28:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:29:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 763376 backedges. 10057 proven. 21168 refuted. 0 times theorem prover too weak. 732151 trivial. 0 not checked. [2024-12-02 15:29:29,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:29:29,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063095570] [2024-12-02 15:29:29,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063095570] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:29:29,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69854900] [2024-12-02 15:29:29,730 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:29:29,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:29:29,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:29:29,732 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:29:29,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-02 15:29:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:29:31,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 11144 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-02 15:29:31,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:29:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 763376 backedges. 3023 proven. 23465 refuted. 0 times theorem prover too weak. 736888 trivial. 0 not checked. [2024-12-02 15:29:32,272 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:29:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 763376 backedges. 3023 proven. 23567 refuted. 0 times theorem prover too weak. 736786 trivial. 0 not checked. [2024-12-02 15:29:56,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69854900] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:29:56,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:29:56,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 29] total 51 [2024-12-02 15:29:56,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653991717] [2024-12-02 15:29:56,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:29:56,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-12-02 15:29:56,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:29:56,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-12-02 15:29:56,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=2273, Unknown=0, NotChecked=0, Total=2550 [2024-12-02 15:29:56,914 INFO L87 Difference]: Start difference. First operand 234 states and 397 transitions. Second operand has 51 states, 49 states have (on average 3.2653061224489797) internal successors, (160), 51 states have internal predecessors, (160), 43 states have call successors, (51), 1 states have call predecessors, (51), 28 states have return successors, (73), 31 states have call predecessors, (73), 43 states have call successors, (73) [2024-12-02 15:29:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:29:59,469 INFO L93 Difference]: Finished difference Result 745 states and 1843 transitions. [2024-12-02 15:29:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-12-02 15:29:59,469 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 3.2653061224489797) internal successors, (160), 51 states have internal predecessors, (160), 43 states have call successors, (51), 1 states have call predecessors, (51), 28 states have return successors, (73), 31 states have call predecessors, (73), 43 states have call successors, (73) Word has length 5011 [2024-12-02 15:29:59,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:29:59,475 INFO L225 Difference]: With dead ends: 745 [2024-12-02 15:29:59,475 INFO L226 Difference]: Without dead ends: 487 [2024-12-02 15:29:59,480 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10126 GetRequests, 9991 SyntacticMatches, 13 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4778 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1859, Invalid=13393, Unknown=0, NotChecked=0, Total=15252 [2024-12-02 15:29:59,480 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 352 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 2329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-12-02 15:29:59,481 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 1004 Invalid, 2329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 1953 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-12-02 15:29:59,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2024-12-02 15:29:59,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 365. [2024-12-02 15:29:59,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 261 states have (on average 1.0459770114942528) internal successors, (273), 252 states have internal predecessors, (273), 75 states have call successors, (75), 61 states have call predecessors, (75), 28 states have return successors, (224), 51 states have call predecessors, (224), 75 states have call successors, (224) [2024-12-02 15:29:59,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 572 transitions. [2024-12-02 15:29:59,519 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 572 transitions. Word has length 5011 [2024-12-02 15:29:59,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:29:59,519 INFO L471 AbstractCegarLoop]: Abstraction has 365 states and 572 transitions. [2024-12-02 15:29:59,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 3.2653061224489797) internal successors, (160), 51 states have internal predecessors, (160), 43 states have call successors, (51), 1 states have call predecessors, (51), 28 states have return successors, (73), 31 states have call predecessors, (73), 43 states have call successors, (73) [2024-12-02 15:29:59,520 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 572 transitions. [2024-12-02 15:30:01,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16313 [2024-12-02 15:30:01,135 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:30:01,138 INFO L218 NwaCegarLoop]: trace histogram [1201, 1201, 1194, 1194, 977, 961, 600, 600, 600, 600, 600, 600, 600, 597, 597, 597, 597, 597, 597, 597, 380, 361, 233, 224, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:30:01,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-12-02 15:30:01,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-12-02 15:30:01,338 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:30:01,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:30:01,342 INFO L85 PathProgramCache]: Analyzing trace with hash 180355253, now seen corresponding path program 20 times [2024-12-02 15:30:01,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:30:01,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167581001] [2024-12-02 15:30:01,343 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:30:01,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:30:20,453 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:30:20,453 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:37:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8099764 backedges. 64828 proven. 81920 refuted. 0 times theorem prover too weak. 7953016 trivial. 0 not checked. [2024-12-02 15:37:06,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:37:06,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167581001] [2024-12-02 15:37:06,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167581001] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:37:06,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184805482] [2024-12-02 15:37:06,923 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:37:06,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:37:06,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:37:06,925 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:37:06,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-12-02 15:37:12,466 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:37:12,466 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:37:12,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 36236 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-12-02 15:37:12,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:37:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8099764 backedges. 8181 proven. 86256 refuted. 0 times theorem prover too weak. 8005327 trivial. 0 not checked. [2024-12-02 15:37:13,457 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:38:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8099764 backedges. 8181 proven. 86376 refuted. 0 times theorem prover too weak. 8005207 trivial. 0 not checked. [2024-12-02 15:38:19,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184805482] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:38:19,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:38:19,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 19, 31] total 58 [2024-12-02 15:38:19,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18221080] [2024-12-02 15:38:19,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:38:19,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-12-02 15:38:19,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:38:19,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-12-02 15:38:19,550 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=2951, Unknown=0, NotChecked=0, Total=3306 [2024-12-02 15:38:19,551 INFO L87 Difference]: Start difference. First operand 365 states and 572 transitions. Second operand has 58 states, 57 states have (on average 3.175438596491228) internal successors, (181), 58 states have internal predecessors, (181), 51 states have call successors, (58), 1 states have call predecessors, (58), 35 states have return successors, (87), 38 states have call predecessors, (87), 51 states have call successors, (87) [2024-12-02 15:38:23,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:38:23,271 INFO L93 Difference]: Finished difference Result 972 states and 2032 transitions. [2024-12-02 15:38:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2024-12-02 15:38:23,272 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.175438596491228) internal successors, (181), 58 states have internal predecessors, (181), 51 states have call successors, (58), 1 states have call predecessors, (58), 35 states have return successors, (87), 38 states have call predecessors, (87), 51 states have call successors, (87) Word has length 16312 [2024-12-02 15:38:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:38:23,280 INFO L225 Difference]: With dead ends: 972 [2024-12-02 15:38:23,280 INFO L226 Difference]: Without dead ends: 612 [2024-12-02 15:38:23,286 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32769 GetRequests, 32598 SyntacticMatches, 15 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8335 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2730, Invalid=22076, Unknown=0, NotChecked=0, Total=24806 [2024-12-02 15:38:23,286 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 418 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 3576 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 3897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 3576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-12-02 15:38:23,286 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 1778 Invalid, 3897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 3576 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-12-02 15:38:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2024-12-02 15:38:23,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 478. [2024-12-02 15:38:23,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 340 states have (on average 1.0294117647058822) internal successors, (350), 333 states have internal predecessors, (350), 104 states have call successors, (104), 82 states have call predecessors, (104), 33 states have return successors, (272), 62 states have call predecessors, (272), 104 states have call successors, (272) [2024-12-02 15:38:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 726 transitions. [2024-12-02 15:38:23,355 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 726 transitions. Word has length 16312 [2024-12-02 15:38:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:38:23,357 INFO L471 AbstractCegarLoop]: Abstraction has 478 states and 726 transitions. [2024-12-02 15:38:23,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.175438596491228) internal successors, (181), 58 states have internal predecessors, (181), 51 states have call successors, (58), 1 states have call predecessors, (58), 35 states have return successors, (87), 38 states have call predecessors, (87), 51 states have call successors, (87) [2024-12-02 15:38:23,357 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 726 transitions. [2024-12-02 15:38:24,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12690 [2024-12-02 15:38:24,252 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:38:24,253 INFO L218 NwaCegarLoop]: trace histogram [932, 932, 931, 931, 754, 753, 466, 466, 466, 466, 466, 466, 466, 465, 465, 465, 465, 465, 465, 465, 289, 287, 178, 178, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:38:24,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-12-02 15:38:24,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd414042-a6a9-4805-b449-f13767cec56c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-12-02 15:38:24,454 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:38:24,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:38:24,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1860058073, now seen corresponding path program 21 times [2024-12-02 15:38:24,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:38:24,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173600625] [2024-12-02 15:38:24,459 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:38:24,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:38:38,823 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 608 check-sat command(s) [2024-12-02 15:38:38,823 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat