./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_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/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_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d89b24ddcb39bc81f78fa19f2306b45fb625208ffa4463b75f31372afe08085d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:11:20,253 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:11:20,330 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:11:20,337 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:11:20,338 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:11:20,390 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:11:20,391 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:11:20,392 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:11:20,392 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:11:20,393 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:11:20,393 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:11:20,393 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:11:20,394 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:11:20,394 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:11:20,395 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:11:20,395 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:11:20,395 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:11:20,396 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:11:20,396 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:11:20,396 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:11:20,396 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:11:20,397 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:11:20,397 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:11:20,397 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:11:20,397 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:11:20,397 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:11:20,397 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:11:20,397 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:11:20,398 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:11:20,398 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:11:20,398 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:11:20,398 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:11:20,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:11:20,399 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:11:20,399 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:11:20,400 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:11:20,400 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:11:20,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:11:20,400 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:11:20,400 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:11:20,400 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:11:20,400 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:11:20,400 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:11:20,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:11:20,401 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:11:20,401 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:11:20,401 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:11:20,401 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:11:20,401 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_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d89b24ddcb39bc81f78fa19f2306b45fb625208ffa4463b75f31372afe08085d [2024-11-28 04:11:20,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:11:20,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:11:20,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:11:20,802 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:11:20,802 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:11:20,804 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursive-simple/fibo_2calls_15-2.c [2024-11-28 04:11:23,879 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/data/8a1ba92a4/886e51a307f04d4a997aad63e5ea4c9f/FLAG6cecfa9fa [2024-11-28 04:11:24,224 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:11:24,229 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/sv-benchmarks/c/recursive-simple/fibo_2calls_15-2.c [2024-11-28 04:11:24,241 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/data/8a1ba92a4/886e51a307f04d4a997aad63e5ea4c9f/FLAG6cecfa9fa [2024-11-28 04:11:24,263 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/data/8a1ba92a4/886e51a307f04d4a997aad63e5ea4c9f [2024-11-28 04:11:24,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:11:24,267 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:11:24,270 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:11:24,272 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:11:24,277 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:11:24,278 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:11:24" (1/1) ... [2024-11-28 04:11:24,280 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52f3a5ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:24, skipping insertion in model container [2024-11-28 04:11:24,282 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:11:24" (1/1) ... [2024-11-28 04:11:24,300 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:11:24,489 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_1fac244a-eb18-4396-82b7-6250bb1b70d3/sv-benchmarks/c/recursive-simple/fibo_2calls_15-2.c[950,963] [2024-11-28 04:11:24,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:11:24,504 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:11:24,519 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_1fac244a-eb18-4396-82b7-6250bb1b70d3/sv-benchmarks/c/recursive-simple/fibo_2calls_15-2.c[950,963] [2024-11-28 04:11:24,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:11:24,537 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:11:24,537 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:24 WrapperNode [2024-11-28 04:11:24,538 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:11:24,539 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:11:24,539 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:11:24,539 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:11:24,548 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:24" (1/1) ... [2024-11-28 04:11:24,555 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:24" (1/1) ... [2024-11-28 04:11:24,572 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-11-28 04:11:24,573 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:11:24,573 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:11:24,574 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:11:24,574 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:11:24,581 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:24" (1/1) ... [2024-11-28 04:11:24,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:24" (1/1) ... [2024-11-28 04:11:24,583 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:24" (1/1) ... [2024-11-28 04:11:24,594 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]. [2024-11-28 04:11:24,594 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:24" (1/1) ... [2024-11-28 04:11:24,595 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:24" (1/1) ... [2024-11-28 04:11:24,598 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:24" (1/1) ... [2024-11-28 04:11:24,599 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:24" (1/1) ... [2024-11-28 04:11:24,601 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:24" (1/1) ... [2024-11-28 04:11:24,602 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:24" (1/1) ... [2024-11-28 04:11:24,602 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:24" (1/1) ... [2024-11-28 04:11:24,604 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:11:24,604 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:11:24,605 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:11:24,605 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:11:24,606 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:24" (1/1) ... [2024-11-28 04:11:24,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:11:24,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:24,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:11:24,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:11:24,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:11:24,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:11:24,674 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-11-28 04:11:24,675 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-11-28 04:11:24,675 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-11-28 04:11:24,675 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-11-28 04:11:24,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:11:24,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:11:24,732 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:11:24,734 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:11:24,878 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-28 04:11:24,878 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:11:24,900 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:11:24,901 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-28 04:11:24,902 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:11:24 BoogieIcfgContainer [2024-11-28 04:11:24,902 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:11:24,907 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:11:24,907 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:11:24,914 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:11:24,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:11:24" (1/3) ... [2024-11-28 04:11:24,916 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5faec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:11:24, skipping insertion in model container [2024-11-28 04:11:24,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:11:24" (2/3) ... [2024-11-28 04:11:24,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5faec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:11:24, skipping insertion in model container [2024-11-28 04:11:24,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:11:24" (3/3) ... [2024-11-28 04:11:24,920 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_15-2.c [2024-11-28 04:11:24,942 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:11:24,945 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. [2024-11-28 04:11:25,018 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:11:25,036 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;@5a8ef9cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:11:25,037 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:11:25,041 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) [2024-11-28 04:11:25,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 04:11:25,049 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:25,050 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:11:25,051 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:25,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:25,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2024-11-28 04:11:25,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:25,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360219697] [2024-11-28 04:11:25,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:25,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:11:25,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:25,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360219697] [2024-11-28 04:11:25,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360219697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:11:25,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:11:25,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:11:25,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238176104] [2024-11-28 04:11:25,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:11:25,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:11:25,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:25,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:11:25,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:11:25,419 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) [2024-11-28 04:11:25,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:25,547 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2024-11-28 04:11:25,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:11:25,550 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 [2024-11-28 04:11:25,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:25,558 INFO L225 Difference]: With dead ends: 41 [2024-11-28 04:11:25,559 INFO L226 Difference]: Without dead ends: 29 [2024-11-28 04:11:25,563 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 [2024-11-28 04:11:25,568 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 [2024-11-28 04:11:25,569 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] [2024-11-28 04:11:25,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-28 04:11:25,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-28 04:11:25,600 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) [2024-11-28 04:11:25,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-28 04:11:25,608 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2024-11-28 04:11:25,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:25,608 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-28 04:11:25,609 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) [2024-11-28 04:11:25,609 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-28 04:11:25,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 04:11:25,610 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:25,610 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:11:25,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:11:25,611 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:25,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:25,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2024-11-28 04:11:25,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:25,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921396131] [2024-11-28 04:11:25,612 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:25,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:11:25,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:25,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921396131] [2024-11-28 04:11:25,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921396131] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:11:25,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:11:25,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:11:25,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022472738] [2024-11-28 04:11:25,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:11:25,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:11:25,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:25,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:11:25,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:11:25,720 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) [2024-11-28 04:11:25,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:25,804 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-11-28 04:11:25,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:11:25,805 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 [2024-11-28 04:11:25,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:25,806 INFO L225 Difference]: With dead ends: 33 [2024-11-28 04:11:25,806 INFO L226 Difference]: Without dead ends: 29 [2024-11-28 04:11:25,807 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 [2024-11-28 04:11:25,808 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 [2024-11-28 04:11:25,808 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] [2024-11-28 04:11:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-28 04:11:25,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-28 04:11:25,815 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) [2024-11-28 04:11:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-28 04:11:25,817 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2024-11-28 04:11:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:25,817 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-28 04:11:25,817 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) [2024-11-28 04:11:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-28 04:11:25,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 04:11:25,818 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:25,818 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] [2024-11-28 04:11:25,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:11:25,819 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:25,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:25,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2024-11-28 04:11:25,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:25,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963951944] [2024-11-28 04:11:25,820 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:25,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:11:25,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:25,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963951944] [2024-11-28 04:11:25,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963951944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:25,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813841156] [2024-11-28 04:11:26,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:26,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:26,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:26,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:26,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:11:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:26,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:11:26,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:11:26,274 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:11:26,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813841156] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:26,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:26,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-11-28 04:11:26,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254487192] [2024-11-28 04:11:26,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:26,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:11:26,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:26,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:11:26,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:11:26,639 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) [2024-11-28 04:11:26,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:26,822 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2024-11-28 04:11:26,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:11:26,823 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 [2024-11-28 04:11:26,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:26,825 INFO L225 Difference]: With dead ends: 55 [2024-11-28 04:11:26,825 INFO L226 Difference]: Without dead ends: 31 [2024-11-28 04:11:26,826 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:11:26,827 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 [2024-11-28 04:11:26,827 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] [2024-11-28 04:11:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-28 04:11:26,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-11-28 04:11:26,834 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) [2024-11-28 04:11:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-28 04:11:26,836 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2024-11-28 04:11:26,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:26,836 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-28 04:11:26,837 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) [2024-11-28 04:11:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-28 04:11:26,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 04:11:26,838 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:26,839 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] [2024-11-28 04:11:26,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:11:27,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-28 04:11:27,043 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:27,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:27,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2024-11-28 04:11:27,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:27,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608814800] [2024-11-28 04:11:27,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:27,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:11:27,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:27,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608814800] [2024-11-28 04:11:27,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608814800] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:27,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253261604] [2024-11-28 04:11:27,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:27,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:27,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:27,262 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:27,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:11:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:27,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:11:27,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:11:27,367 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:11:27,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253261604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:27,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:27,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-11-28 04:11:27,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328940362] [2024-11-28 04:11:27,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:27,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:11:27,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:27,684 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:11:27,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:11:27,684 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) [2024-11-28 04:11:27,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:27,878 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-11-28 04:11:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:11:27,879 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 [2024-11-28 04:11:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:27,883 INFO L225 Difference]: With dead ends: 40 [2024-11-28 04:11:27,883 INFO L226 Difference]: Without dead ends: 36 [2024-11-28 04:11:27,883 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 [2024-11-28 04:11:27,884 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, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:27,887 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 123 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:11:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-28 04:11:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2024-11-28 04:11:27,901 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) [2024-11-28 04:11:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-11-28 04:11:27,902 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2024-11-28 04:11:27,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:27,906 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-11-28 04:11:27,906 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) [2024-11-28 04:11:27,906 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-11-28 04:11:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 04:11:27,907 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:27,908 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] [2024-11-28 04:11:27,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:11:28,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:28,108 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:28,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:28,109 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2024-11-28 04:11:28,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:28,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720271030] [2024-11-28 04:11:28,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:28,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:11:28,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:28,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720271030] [2024-11-28 04:11:28,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720271030] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:28,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015581863] [2024-11-28 04:11:28,222 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:28,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:28,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:28,225 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:28,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:11:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:28,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:11:28,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:11:28,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:11:28,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015581863] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:28,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:28,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2024-11-28 04:11:28,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993637160] [2024-11-28 04:11:28,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:28,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:11:28,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:28,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:11:28,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:11:28,985 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) [2024-11-28 04:11:29,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:29,245 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2024-11-28 04:11:29,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:11:29,246 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 [2024-11-28 04:11:29,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:29,250 INFO L225 Difference]: With dead ends: 69 [2024-11-28 04:11:29,251 INFO L226 Difference]: Without dead ends: 38 [2024-11-28 04:11:29,252 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 [2024-11-28 04:11:29,255 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:29,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 146 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:11:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-28 04:11:29,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-11-28 04:11:29,269 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) [2024-11-28 04:11:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-11-28 04:11:29,271 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2024-11-28 04:11:29,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:29,271 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-11-28 04:11:29,272 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) [2024-11-28 04:11:29,272 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2024-11-28 04:11:29,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 04:11:29,276 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:29,276 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] [2024-11-28 04:11:29,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 04:11:29,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:29,477 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:29,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:29,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2024-11-28 04:11:29,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:29,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648306467] [2024-11-28 04:11:29,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:29,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:11:29,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:29,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648306467] [2024-11-28 04:11:29,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648306467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:29,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584565983] [2024-11-28 04:11:29,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:29,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:29,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:29,670 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:29,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:11:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:29,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:11:29,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:11:29,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:11:30,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584565983] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:30,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:30,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2024-11-28 04:11:30,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531531966] [2024-11-28 04:11:30,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:30,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:11:30,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:30,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:11:30,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:11:30,346 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) [2024-11-28 04:11:30,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:30,967 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2024-11-28 04:11:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 04:11:30,968 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 [2024-11-28 04:11:30,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:30,970 INFO L225 Difference]: With dead ends: 101 [2024-11-28 04:11:30,970 INFO L226 Difference]: Without dead ends: 68 [2024-11-28 04:11:30,971 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:11:30,972 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:30,973 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 303 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:11:30,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-28 04:11:30,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2024-11-28 04:11:30,998 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) [2024-11-28 04:11:31,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2024-11-28 04:11:31,007 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2024-11-28 04:11:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:31,007 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2024-11-28 04:11:31,008 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) [2024-11-28 04:11:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2024-11-28 04:11:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 04:11:31,013 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:31,014 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] [2024-11-28 04:11:31,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 04:11:31,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:31,214 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:31,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:31,215 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2024-11-28 04:11:31,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:31,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883921583] [2024-11-28 04:11:31,216 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:31,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 04:11:31,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:31,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883921583] [2024-11-28 04:11:31,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883921583] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:31,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392445554] [2024-11-28 04:11:31,385 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:31,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:31,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:31,388 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:31,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:11:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:31,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:11:31,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 04:11:31,575 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:11:32,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392445554] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:32,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:32,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2024-11-28 04:11:32,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997431742] [2024-11-28 04:11:32,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:32,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 04:11:32,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:32,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 04:11:32,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:11:32,303 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) [2024-11-28 04:11:32,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:32,615 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2024-11-28 04:11:32,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:11:32,616 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 [2024-11-28 04:11:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:32,618 INFO L225 Difference]: With dead ends: 102 [2024-11-28 04:11:32,618 INFO L226 Difference]: Without dead ends: 98 [2024-11-28 04:11:32,619 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:11:32,620 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:32,621 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 164 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:11:32,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-28 04:11:32,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2024-11-28 04:11:32,650 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) [2024-11-28 04:11:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2024-11-28 04:11:32,652 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2024-11-28 04:11:32,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:32,655 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2024-11-28 04:11:32,656 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) [2024-11-28 04:11:32,656 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2024-11-28 04:11:32,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-28 04:11:32,659 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:32,659 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] [2024-11-28 04:11:32,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 04:11:32,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:32,860 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:32,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:32,861 INFO L85 PathProgramCache]: Analyzing trace with hash -586612948, now seen corresponding path program 1 times [2024-11-28 04:11:32,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:32,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445622691] [2024-11-28 04:11:32,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:32,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 59 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-11-28 04:11:33,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:33,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445622691] [2024-11-28 04:11:33,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445622691] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:33,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209670696] [2024-11-28 04:11:33,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:11:33,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:33,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:33,205 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:33,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:11:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:33,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:11:33,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-28 04:11:33,513 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 102 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-28 04:11:34,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209670696] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:34,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:34,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2024-11-28 04:11:34,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389232889] [2024-11-28 04:11:34,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:34,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:11:34,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:34,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:11:34,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:11:34,731 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) [2024-11-28 04:11:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:35,607 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2024-11-28 04:11:35,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 04:11:35,608 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 [2024-11-28 04:11:35,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:35,612 INFO L225 Difference]: With dead ends: 177 [2024-11-28 04:11:35,612 INFO L226 Difference]: Without dead ends: 104 [2024-11-28 04:11:35,615 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 04:11:35,616 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 96 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:35,617 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 325 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:11:35,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-28 04:11:35,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2024-11-28 04:11:35,636 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) [2024-11-28 04:11:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2024-11-28 04:11:35,639 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 93 [2024-11-28 04:11:35,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:35,639 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2024-11-28 04:11:35,639 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) [2024-11-28 04:11:35,640 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2024-11-28 04:11:35,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-28 04:11:35,645 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:35,645 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] [2024-11-28 04:11:35,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:11:35,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:35,849 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:35,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:35,850 INFO L85 PathProgramCache]: Analyzing trace with hash 437944761, now seen corresponding path program 2 times [2024-11-28 04:11:35,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:35,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909627961] [2024-11-28 04:11:35,850 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:11:35,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:35,888 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:11:35,889 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 43 proven. 179 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2024-11-28 04:11:36,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:36,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909627961] [2024-11-28 04:11:36,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909627961] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:36,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081981386] [2024-11-28 04:11:36,263 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:11:36,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:36,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:36,266 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:36,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:11:36,387 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:11:36,388 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:36,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:11:36,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 30 proven. 244 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2024-11-28 04:11:36,594 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 30 proven. 260 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-11-28 04:11:38,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081981386] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:38,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:38,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2024-11-28 04:11:38,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716140104] [2024-11-28 04:11:38,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:38,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:11:38,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:38,490 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:11:38,490 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:11:38,491 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) [2024-11-28 04:11:38,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:38,903 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2024-11-28 04:11:38,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:11:38,904 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 [2024-11-28 04:11:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:38,909 INFO L225 Difference]: With dead ends: 132 [2024-11-28 04:11:38,911 INFO L226 Difference]: Without dead ends: 128 [2024-11-28 04:11:38,912 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 302 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:11:38,913 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 70 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:38,913 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 196 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:11:38,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-28 04:11:38,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2024-11-28 04:11:38,960 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) [2024-11-28 04:11:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2024-11-28 04:11:38,968 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 159 [2024-11-28 04:11:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:38,968 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2024-11-28 04:11:38,969 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) [2024-11-28 04:11:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2024-11-28 04:11:38,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2024-11-28 04:11:38,977 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:38,977 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] [2024-11-28 04:11:38,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 04:11:39,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:39,184 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:39,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:39,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1279109938, now seen corresponding path program 2 times [2024-11-28 04:11:39,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:39,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197421479] [2024-11-28 04:11:39,185 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:11:39,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:39,269 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:11:39,269 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 158 proven. 490 refuted. 0 times theorem prover too weak. 1585 trivial. 0 not checked. [2024-11-28 04:11:39,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:39,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197421479] [2024-11-28 04:11:39,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197421479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:39,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983299230] [2024-11-28 04:11:39,927 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:11:39,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:39,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:39,930 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:39,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:11:40,113 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:11:40,114 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:40,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:11:40,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 569 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2024-11-28 04:11:40,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 593 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2024-11-28 04:11:43,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983299230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:43,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:43,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17] total 29 [2024-11-28 04:11:43,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224419007] [2024-11-28 04:11:43,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:43,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:11:43,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:43,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:11:43,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:11:43,098 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) [2024-11-28 04:11:44,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:44,308 INFO L93 Difference]: Finished difference Result 323 states and 666 transitions. [2024-11-28 04:11:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 04:11:44,309 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 [2024-11-28 04:11:44,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:44,314 INFO L225 Difference]: With dead ends: 323 [2024-11-28 04:11:44,314 INFO L226 Difference]: Without dead ends: 214 [2024-11-28 04:11:44,317 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 547 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 04:11:44,318 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 158 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:44,318 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 449 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 04:11:44,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-28 04:11:44,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 184. [2024-11-28 04:11:44,351 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) [2024-11-28 04:11:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 301 transitions. [2024-11-28 04:11:44,355 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 301 transitions. Word has length 284 [2024-11-28 04:11:44,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:44,356 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 301 transitions. [2024-11-28 04:11:44,356 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) [2024-11-28 04:11:44,356 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 301 transitions. [2024-11-28 04:11:44,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2024-11-28 04:11:44,364 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:44,364 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] [2024-11-28 04:11:44,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 04:11:44,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 04:11:44,565 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:44,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:44,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1695767594, now seen corresponding path program 3 times [2024-11-28 04:11:44,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:44,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544685426] [2024-11-28 04:11:44,566 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:11:44,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:44,595 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:11:44,595 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 515 proven. 4 refuted. 0 times theorem prover too weak. 3856 trivial. 0 not checked. [2024-11-28 04:11:44,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:44,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544685426] [2024-11-28 04:11:44,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544685426] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:44,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024415435] [2024-11-28 04:11:44,733 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:11:44,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:44,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:44,737 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:44,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:11:44,888 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:11:44,888 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:44,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:11:44,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 760 proven. 6 refuted. 0 times theorem prover too weak. 3609 trivial. 0 not checked. [2024-11-28 04:11:44,995 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 619 proven. 12 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2024-11-28 04:11:46,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024415435] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:46,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:46,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-11-28 04:11:46,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082876628] [2024-11-28 04:11:46,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:46,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:11:46,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:46,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:11:46,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:11:46,440 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) [2024-11-28 04:11:46,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:46,642 INFO L93 Difference]: Finished difference Result 360 states and 621 transitions. [2024-11-28 04:11:46,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:11:46,643 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 [2024-11-28 04:11:46,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:46,647 INFO L225 Difference]: With dead ends: 360 [2024-11-28 04:11:46,647 INFO L226 Difference]: Without dead ends: 181 [2024-11-28 04:11:46,649 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 [2024-11-28 04:11:46,650 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:46,650 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 152 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:11:46,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-28 04:11:46,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2024-11-28 04:11:46,674 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) [2024-11-28 04:11:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 266 transitions. [2024-11-28 04:11:46,678 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 266 transitions. Word has length 389 [2024-11-28 04:11:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:46,678 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 266 transitions. [2024-11-28 04:11:46,678 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) [2024-11-28 04:11:46,678 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 266 transitions. [2024-11-28 04:11:46,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2024-11-28 04:11:46,689 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:46,689 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] [2024-11-28 04:11:46,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 04:11:46,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 04:11:46,894 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:46,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:46,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1299493047, now seen corresponding path program 4 times [2024-11-28 04:11:46,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:46,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875959291] [2024-11-28 04:11:46,895 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:11:46,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:46,962 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:11:46,963 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6213 backedges. 196 proven. 801 refuted. 0 times theorem prover too weak. 5216 trivial. 0 not checked. [2024-11-28 04:11:47,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:47,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875959291] [2024-11-28 04:11:47,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875959291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:47,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66372920] [2024-11-28 04:11:47,533 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:11:47,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:47,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:47,536 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:47,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:11:47,777 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:11:47,777 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:47,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:11:47,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6213 backedges. 1477 proven. 19 refuted. 0 times theorem prover too weak. 4717 trivial. 0 not checked. [2024-11-28 04:11:47,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6213 backedges. 196 proven. 927 refuted. 0 times theorem prover too weak. 5090 trivial. 0 not checked. [2024-11-28 04:11:50,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66372920] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:50,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:50,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 17 [2024-11-28 04:11:50,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348603717] [2024-11-28 04:11:50,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:50,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 04:11:50,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:50,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 04:11:50,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:11:50,092 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) [2024-11-28 04:11:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:50,353 INFO L93 Difference]: Finished difference Result 327 states and 532 transitions. [2024-11-28 04:11:50,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:11:50,354 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 [2024-11-28 04:11:50,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:50,357 INFO L225 Difference]: With dead ends: 327 [2024-11-28 04:11:50,358 INFO L226 Difference]: Without dead ends: 139 [2024-11-28 04:11:50,360 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 937 GetRequests, 911 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:11:50,361 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, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:50,361 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:11:50,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-11-28 04:11:50,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-11-28 04:11:50,383 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) [2024-11-28 04:11:50,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 203 transitions. [2024-11-28 04:11:50,386 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 203 transitions. Word has length 461 [2024-11-28 04:11:50,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:50,386 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 203 transitions. [2024-11-28 04:11:50,387 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) [2024-11-28 04:11:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 203 transitions. [2024-11-28 04:11:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2024-11-28 04:11:50,391 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:50,391 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] [2024-11-28 04:11:50,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:11:50,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 04:11:50,596 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:50,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:50,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1298209125, now seen corresponding path program 5 times [2024-11-28 04:11:50,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:50,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678235241] [2024-11-28 04:11:50,597 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:11:50,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:50,624 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:11:50,624 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 261 proven. 727 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2024-11-28 04:11:50,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:50,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678235241] [2024-11-28 04:11:50,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678235241] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:50,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147294484] [2024-11-28 04:11:50,770 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:11:50,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:50,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:50,772 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:50,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:11:50,940 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:11:50,940 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:50,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:11:50,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 1710 proven. 31 refuted. 0 times theorem prover too weak. 2991 trivial. 0 not checked. [2024-11-28 04:11:51,043 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 261 proven. 727 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2024-11-28 04:11:52,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147294484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:52,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:52,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2024-11-28 04:11:52,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462390341] [2024-11-28 04:11:52,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:52,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:11:52,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:52,920 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:11:52,920 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:11:52,920 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) [2024-11-28 04:11:53,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:53,238 INFO L93 Difference]: Finished difference Result 283 states and 449 transitions. [2024-11-28 04:11:53,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:11:53,240 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 [2024-11-28 04:11:53,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:53,243 INFO L225 Difference]: With dead ends: 283 [2024-11-28 04:11:53,244 INFO L226 Difference]: Without dead ends: 146 [2024-11-28 04:11:53,245 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 [2024-11-28 04:11:53,246 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:53,246 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 164 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:11:53,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-28 04:11:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2024-11-28 04:11:53,266 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) [2024-11-28 04:11:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 209 transitions. [2024-11-28 04:11:53,269 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 209 transitions. Word has length 406 [2024-11-28 04:11:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:53,269 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 209 transitions. [2024-11-28 04:11:53,270 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) [2024-11-28 04:11:53,270 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 209 transitions. [2024-11-28 04:11:53,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2024-11-28 04:11:53,274 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:53,274 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] [2024-11-28 04:11:53,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 04:11:53,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 04:11:53,479 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:53,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:53,480 INFO L85 PathProgramCache]: Analyzing trace with hash -821151567, now seen corresponding path program 6 times [2024-11-28 04:11:53,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:53,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129353126] [2024-11-28 04:11:53,480 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:11:53,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:53,614 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-28 04:11:53,614 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6872 backedges. 258 proven. 808 refuted. 0 times theorem prover too weak. 5806 trivial. 0 not checked. [2024-11-28 04:11:54,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:54,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129353126] [2024-11-28 04:11:54,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129353126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:54,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642771862] [2024-11-28 04:11:54,052 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:11:54,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:54,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:54,054 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:54,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:11:54,309 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-28 04:11:54,309 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:11:54,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:11:54,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6872 backedges. 258 proven. 808 refuted. 0 times theorem prover too weak. 5806 trivial. 0 not checked. [2024-11-28 04:11:54,419 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:11:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6872 backedges. 260 proven. 822 refuted. 0 times theorem prover too weak. 5790 trivial. 0 not checked. [2024-11-28 04:11:56,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642771862] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:11:56,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:11:56,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 18 [2024-11-28 04:11:56,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969026136] [2024-11-28 04:11:56,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:11:56,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:11:56,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:11:56,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:11:56,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:11:56,892 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) [2024-11-28 04:11:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:11:57,140 INFO L93 Difference]: Finished difference Result 164 states and 262 transitions. [2024-11-28 04:11:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:11:57,140 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 [2024-11-28 04:11:57,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:11:57,145 INFO L225 Difference]: With dead ends: 164 [2024-11-28 04:11:57,145 INFO L226 Difference]: Without dead ends: 160 [2024-11-28 04:11:57,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 965 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:11:57,146 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:11:57,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 144 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:11:57,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-28 04:11:57,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 152. [2024-11-28 04:11:57,197 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) [2024-11-28 04:11:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 240 transitions. [2024-11-28 04:11:57,199 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 240 transitions. Word has length 487 [2024-11-28 04:11:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:11:57,200 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 240 transitions. [2024-11-28 04:11:57,201 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) [2024-11-28 04:11:57,201 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 240 transitions. [2024-11-28 04:11:57,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2024-11-28 04:11:57,205 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:11:57,205 INFO L218 NwaCegarLoop]: trace histogram [36, 36, 33, 33, 29, 28, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 11, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:11:57,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 04:11:57,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 04:11:57,410 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:11:57,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:11:57,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1909726294, now seen corresponding path program 7 times [2024-11-28 04:11:57,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:11:57,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010457554] [2024-11-28 04:11:57,411 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:11:57,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:11:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6508 backedges. 226 proven. 810 refuted. 0 times theorem prover too weak. 5472 trivial. 0 not checked. [2024-11-28 04:11:58,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:11:58,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010457554] [2024-11-28 04:11:58,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010457554] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:11:58,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840449389] [2024-11-28 04:11:58,168 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:11:58,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:11:58,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:11:58,170 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:11:58,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:11:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:11:58,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:11:58,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:11:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6508 backedges. 172 proven. 1187 refuted. 0 times theorem prover too weak. 5149 trivial. 0 not checked. [2024-11-28 04:11:58,685 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:12:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6508 backedges. 172 proven. 1220 refuted. 0 times theorem prover too weak. 5116 trivial. 0 not checked. [2024-11-28 04:12:02,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840449389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:12:02,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:12:02,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 19] total 26 [2024-11-28 04:12:02,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336226331] [2024-11-28 04:12:02,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:12:02,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 04:12:02,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:12:02,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 04:12:02,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2024-11-28 04:12:02,479 INFO L87 Difference]: Start difference. First operand 152 states and 240 transitions. Second operand has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 22 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) [2024-11-28 04:12:02,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:12:02,954 INFO L93 Difference]: Finished difference Result 191 states and 356 transitions. [2024-11-28 04:12:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 04:12:02,955 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), 22 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) Word has length 475 [2024-11-28 04:12:02,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:12:02,963 INFO L225 Difference]: With dead ends: 191 [2024-11-28 04:12:02,963 INFO L226 Difference]: Without dead ends: 187 [2024-11-28 04:12:02,966 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 931 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 04:12:02,967 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:12:02,968 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 214 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:12:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-28 04:12:02,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 174. [2024-11-28 04:12:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 116 states have internal predecessors, (132), 31 states have call successors, (31), 16 states have call predecessors, (31), 25 states have return successors, (141), 41 states have call predecessors, (141), 31 states have call successors, (141) [2024-11-28 04:12:02,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 304 transitions. [2024-11-28 04:12:03,000 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 304 transitions. Word has length 475 [2024-11-28 04:12:03,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:12:03,001 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 304 transitions. [2024-11-28 04:12:03,001 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), 22 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) [2024-11-28 04:12:03,001 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 304 transitions. [2024-11-28 04:12:03,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 874 [2024-11-28 04:12:03,010 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:12:03,011 INFO L218 NwaCegarLoop]: trace histogram [70, 70, 57, 57, 54, 53, 35, 35, 35, 35, 35, 35, 35, 28, 28, 28, 28, 28, 28, 28, 26, 18, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:12:03,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 04:12:03,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 04:12:03,215 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:12:03,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:12:03,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2098293967, now seen corresponding path program 8 times [2024-11-28 04:12:03,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:12:03,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465378890] [2024-11-28 04:12:03,216 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:12:03,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:12:03,386 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:12:03,386 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22745 backedges. 485 proven. 1823 refuted. 0 times theorem prover too weak. 20437 trivial. 0 not checked. [2024-11-28 04:12:04,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:12:04,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465378890] [2024-11-28 04:12:04,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465378890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:12:04,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485146617] [2024-11-28 04:12:04,897 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:12:04,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:04,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:12:04,900 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:12:04,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:12:05,406 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:12:05,406 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:05,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 04:12:05,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:12:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 22745 backedges. 359 proven. 2601 refuted. 0 times theorem prover too weak. 19785 trivial. 0 not checked. [2024-11-28 04:12:05,650 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:12:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 22745 backedges. 359 proven. 2645 refuted. 0 times theorem prover too weak. 19741 trivial. 0 not checked. [2024-11-28 04:12:11,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485146617] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:12:11,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:12:11,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 21] total 28 [2024-11-28 04:12:11,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189112677] [2024-11-28 04:12:11,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:12:11,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:12:11,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:12:11,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:12:11,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:12:11,787 INFO L87 Difference]: Start difference. First operand 174 states and 304 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) [2024-11-28 04:12:12,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:12:12,336 INFO L93 Difference]: Finished difference Result 227 states and 506 transitions. [2024-11-28 04:12:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:12:12,337 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 873 [2024-11-28 04:12:12,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:12:12,344 INFO L225 Difference]: With dead ends: 227 [2024-11-28 04:12:12,344 INFO L226 Difference]: Without dead ends: 223 [2024-11-28 04:12:12,345 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1773 GetRequests, 1726 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 04:12:12,346 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 127 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:12:12,346 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 224 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:12:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-28 04:12:12,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 167. [2024-11-28 04:12:12,377 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) [2024-11-28 04:12:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 284 transitions. [2024-11-28 04:12:12,380 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 284 transitions. Word has length 873 [2024-11-28 04:12:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:12:12,381 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 284 transitions. [2024-11-28 04:12:12,382 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) [2024-11-28 04:12:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 284 transitions. [2024-11-28 04:12:12,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1496 [2024-11-28 04:12:12,402 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:12:12,403 INFO L218 NwaCegarLoop]: trace histogram [114, 114, 105, 105, 91, 86, 57, 57, 57, 57, 57, 57, 57, 52, 52, 52, 52, 52, 52, 52, 34, 34, 28, 14, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:12:12,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:12:12,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 04:12:12,607 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:12:12,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:12:12,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1549587885, now seen corresponding path program 9 times [2024-11-28 04:12:12,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:12:12,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515336714] [2024-11-28 04:12:12,608 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:12:12,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:12:12,680 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 04:12:12,680 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 67042 backedges. 3331 proven. 25 refuted. 0 times theorem prover too weak. 63686 trivial. 0 not checked. [2024-11-28 04:12:13,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:12:13,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515336714] [2024-11-28 04:12:13,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515336714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:12:13,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113264785] [2024-11-28 04:12:13,037 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:12:13,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:13,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:12:13,039 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:12:13,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:12:13,446 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 04:12:13,446 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:13,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:12:13,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:12:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 67042 backedges. 3795 proven. 33 refuted. 0 times theorem prover too weak. 63214 trivial. 0 not checked. [2024-11-28 04:12:13,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:12:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 67042 backedges. 3795 proven. 35 refuted. 0 times theorem prover too weak. 63212 trivial. 0 not checked. [2024-11-28 04:12:19,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113264785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:12:19,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:12:19,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 13] total 25 [2024-11-28 04:12:19,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158956717] [2024-11-28 04:12:19,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:12:19,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:12:19,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:12:19,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:12:19,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:12:19,291 INFO L87 Difference]: Start difference. First operand 167 states and 284 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 12 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (23), 10 states have call predecessors, (23), 12 states have call successors, (23) [2024-11-28 04:12:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:12:19,847 INFO L93 Difference]: Finished difference Result 336 states and 666 transitions. [2024-11-28 04:12:19,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:12:19,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 12 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (23), 10 states have call predecessors, (23), 12 states have call successors, (23) Word has length 1495 [2024-11-28 04:12:19,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:12:19,852 INFO L225 Difference]: With dead ends: 336 [2024-11-28 04:12:19,852 INFO L226 Difference]: Without dead ends: 176 [2024-11-28 04:12:19,854 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3015 GetRequests, 2974 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 04:12:19,855 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:12:19,855 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 289 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:12:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-28 04:12:19,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2024-11-28 04:12:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 119 states have (on average 1.1008403361344539) internal successors, (131), 115 states have internal predecessors, (131), 29 states have call successors, (29), 19 states have call predecessors, (29), 24 states have return successors, (121), 38 states have call predecessors, (121), 29 states have call successors, (121) [2024-11-28 04:12:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 281 transitions. [2024-11-28 04:12:19,884 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 281 transitions. Word has length 1495 [2024-11-28 04:12:19,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:12:19,885 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 281 transitions. [2024-11-28 04:12:19,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 12 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (23), 10 states have call predecessors, (23), 12 states have call successors, (23) [2024-11-28 04:12:19,886 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 281 transitions. [2024-11-28 04:12:19,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1289 [2024-11-28 04:12:19,902 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:12:19,902 INFO L218 NwaCegarLoop]: trace histogram [97, 97, 92, 92, 77, 73, 48, 48, 48, 48, 48, 48, 48, 46, 46, 46, 46, 46, 46, 46, 31, 25, 20, 19, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:12:19,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 04:12:20,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 04:12:20,107 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:12:20,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:12:20,108 INFO L85 PathProgramCache]: Analyzing trace with hash 649651838, now seen corresponding path program 10 times [2024-11-28 04:12:20,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:12:20,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327098699] [2024-11-28 04:12:20,108 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:12:20,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:12:20,367 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:12:20,367 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 49574 backedges. 1042 proven. 4693 refuted. 0 times theorem prover too weak. 43839 trivial. 0 not checked. [2024-11-28 04:12:22,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:12:22,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327098699] [2024-11-28 04:12:22,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327098699] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:12:22,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962954603] [2024-11-28 04:12:22,883 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:12:22,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:22,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:12:22,885 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:12:22,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:12:23,500 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:12:23,501 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:23,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 2289 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:12:23,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:12:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 49574 backedges. 14624 proven. 409 refuted. 0 times theorem prover too weak. 34541 trivial. 0 not checked. [2024-11-28 04:12:23,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:12:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 49574 backedges. 925 proven. 5424 refuted. 0 times theorem prover too weak. 43225 trivial. 0 not checked. [2024-11-28 04:12:31,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962954603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:12:31,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:12:31,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 32 [2024-11-28 04:12:31,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923844594] [2024-11-28 04:12:31,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:12:31,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 04:12:31,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:12:31,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 04:12:31,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:12:31,346 INFO L87 Difference]: Start difference. First operand 173 states and 281 transitions. Second operand has 32 states, 32 states have (on average 3.625) internal successors, (116), 32 states have internal predecessors, (116), 26 states have call successors, (36), 2 states have call predecessors, (36), 13 states have return successors, (45), 14 states have call predecessors, (45), 26 states have call successors, (45) [2024-11-28 04:12:32,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:12:32,512 INFO L93 Difference]: Finished difference Result 376 states and 706 transitions. [2024-11-28 04:12:32,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 04:12:32,513 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 32 states have internal predecessors, (116), 26 states have call successors, (36), 2 states have call predecessors, (36), 13 states have return successors, (45), 14 states have call predecessors, (45), 26 states have call successors, (45) Word has length 1288 [2024-11-28 04:12:32,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:12:32,518 INFO L225 Difference]: With dead ends: 376 [2024-11-28 04:12:32,519 INFO L226 Difference]: Without dead ends: 202 [2024-11-28 04:12:32,523 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2628 GetRequests, 2556 SyntacticMatches, 11 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=590, Invalid=3316, Unknown=0, NotChecked=0, Total=3906 [2024-11-28 04:12:32,524 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 122 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:12:32,524 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 462 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:12:32,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-28 04:12:32,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 179. [2024-11-28 04:12:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 124 states have (on average 1.0725806451612903) internal successors, (133), 120 states have internal predecessors, (133), 32 states have call successors, (32), 22 states have call predecessors, (32), 22 states have return successors, (104), 36 states have call predecessors, (104), 32 states have call successors, (104) [2024-11-28 04:12:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 269 transitions. [2024-11-28 04:12:32,563 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 269 transitions. Word has length 1288 [2024-11-28 04:12:32,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:12:32,564 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 269 transitions. [2024-11-28 04:12:32,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 32 states have internal predecessors, (116), 26 states have call successors, (36), 2 states have call predecessors, (36), 13 states have return successors, (45), 14 states have call predecessors, (45), 26 states have call successors, (45) [2024-11-28 04:12:32,564 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 269 transitions. [2024-11-28 04:12:32,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1360 [2024-11-28 04:12:32,594 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:12:32,594 INFO L218 NwaCegarLoop]: trace histogram [101, 101, 98, 98, 81, 80, 50, 50, 50, 50, 50, 50, 50, 49, 49, 49, 49, 49, 49, 49, 32, 30, 20, 18, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:12:32,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 04:12:32,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 04:12:32,798 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:12:32,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:12:32,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1919276721, now seen corresponding path program 11 times [2024-11-28 04:12:32,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:12:32,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106914580] [2024-11-28 04:12:32,800 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:12:32,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:12:33,203 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2024-11-28 04:12:33,203 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 55216 backedges. 1236 proven. 4831 refuted. 0 times theorem prover too weak. 49149 trivial. 0 not checked. [2024-11-28 04:12:35,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:12:35,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106914580] [2024-11-28 04:12:35,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106914580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:12:35,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632781896] [2024-11-28 04:12:35,363 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:12:35,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:35,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:12:35,366 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:12:35,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:12:36,409 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2024-11-28 04:12:36,409 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:36,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 2421 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:12:36,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:12:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 55216 backedges. 22223 proven. 568 refuted. 0 times theorem prover too weak. 32425 trivial. 0 not checked. [2024-11-28 04:12:36,615 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:12:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 55216 backedges. 1280 proven. 5150 refuted. 0 times theorem prover too weak. 48786 trivial. 0 not checked. [2024-11-28 04:12:44,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632781896] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:12:44,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:12:44,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 30 [2024-11-28 04:12:44,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127156388] [2024-11-28 04:12:44,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:12:44,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 04:12:44,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:12:44,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 04:12:44,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:12:44,337 INFO L87 Difference]: Start difference. First operand 179 states and 269 transitions. Second operand has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 22 states have call successors, (35), 2 states have call predecessors, (35), 12 states have return successors, (42), 15 states have call predecessors, (42), 22 states have call successors, (42) [2024-11-28 04:12:45,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:12:45,389 INFO L93 Difference]: Finished difference Result 436 states and 764 transitions. [2024-11-28 04:12:45,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 04:12:45,390 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 22 states have call successors, (35), 2 states have call predecessors, (35), 12 states have return successors, (42), 15 states have call predecessors, (42), 22 states have call successors, (42) Word has length 1359 [2024-11-28 04:12:45,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:12:45,396 INFO L225 Difference]: With dead ends: 436 [2024-11-28 04:12:45,396 INFO L226 Difference]: Without dead ends: 213 [2024-11-28 04:12:45,399 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2763 GetRequests, 2700 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=444, Invalid=2418, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 04:12:45,400 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 106 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:12:45,401 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 414 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:12:45,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-28 04:12:45,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 192. [2024-11-28 04:12:45,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 133 states have (on average 1.0676691729323309) internal successors, (142), 129 states have internal predecessors, (142), 35 states have call successors, (35), 24 states have call predecessors, (35), 23 states have return successors, (114), 38 states have call predecessors, (114), 35 states have call successors, (114) [2024-11-28 04:12:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 291 transitions. [2024-11-28 04:12:45,431 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 291 transitions. Word has length 1359 [2024-11-28 04:12:45,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:12:45,431 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 291 transitions. [2024-11-28 04:12:45,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 22 states have call successors, (35), 2 states have call predecessors, (35), 12 states have return successors, (42), 15 states have call predecessors, (42), 22 states have call successors, (42) [2024-11-28 04:12:45,432 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 291 transitions. [2024-11-28 04:12:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1578 [2024-11-28 04:12:45,453 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:12:45,453 INFO L218 NwaCegarLoop]: trace histogram [118, 118, 113, 113, 95, 92, 59, 59, 59, 59, 59, 59, 59, 56, 56, 56, 56, 56, 56, 56, 39, 33, 23, 21, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:12:45,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 04:12:45,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:45,654 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:12:45,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:12:45,656 INFO L85 PathProgramCache]: Analyzing trace with hash -2065507241, now seen corresponding path program 12 times [2024-11-28 04:12:45,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:12:45,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856147532] [2024-11-28 04:12:45,656 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:12:45,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:12:45,815 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2024-11-28 04:12:45,816 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 74579 backedges. 1493 proven. 4619 refuted. 0 times theorem prover too weak. 68467 trivial. 0 not checked. [2024-11-28 04:12:46,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:12:46,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856147532] [2024-11-28 04:12:46,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856147532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:12:46,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248394706] [2024-11-28 04:12:46,668 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:12:46,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:46,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:12:46,672 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:12:46,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 04:12:47,319 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2024-11-28 04:12:47,320 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:12:47,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:12:47,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:12:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 74579 backedges. 1493 proven. 4619 refuted. 0 times theorem prover too weak. 68467 trivial. 0 not checked. [2024-11-28 04:12:47,511 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:12:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 74579 backedges. 1497 proven. 4669 refuted. 0 times theorem prover too weak. 68413 trivial. 0 not checked. [2024-11-28 04:12:56,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248394706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:12:56,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:12:56,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 23] total 26 [2024-11-28 04:12:56,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712246190] [2024-11-28 04:12:56,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:12:56,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 04:12:56,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:12:56,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 04:12:56,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2024-11-28 04:12:56,708 INFO L87 Difference]: Start difference. First operand 192 states and 291 transitions. Second operand has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 21 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (34), 14 states have call predecessors, (34), 21 states have call successors, (34) [2024-11-28 04:12:57,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:12:57,095 INFO L93 Difference]: Finished difference Result 227 states and 393 transitions. [2024-11-28 04:12:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:12:57,096 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), 21 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (34), 14 states have call predecessors, (34), 21 states have call successors, (34) Word has length 1577 [2024-11-28 04:12:57,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:12:57,102 INFO L225 Difference]: With dead ends: 227 [2024-11-28 04:12:57,102 INFO L226 Difference]: Without dead ends: 223 [2024-11-28 04:12:57,103 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3184 GetRequests, 3141 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 04:12:57,104 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 81 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:12:57,104 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 231 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:12:57,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-28 04:12:57,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 202. [2024-11-28 04:12:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 139 states have (on average 1.064748201438849) internal successors, (148), 135 states have internal predecessors, (148), 37 states have call successors, (37), 24 states have call predecessors, (37), 25 states have return successors, (132), 42 states have call predecessors, (132), 37 states have call successors, (132) [2024-11-28 04:12:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 317 transitions. [2024-11-28 04:12:57,142 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 317 transitions. Word has length 1577 [2024-11-28 04:12:57,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:12:57,145 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 317 transitions. [2024-11-28 04:12:57,145 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), 21 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (34), 14 states have call predecessors, (34), 21 states have call successors, (34) [2024-11-28 04:12:57,145 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 317 transitions. [2024-11-28 04:12:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2328 [2024-11-28 04:12:57,187 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:12:57,187 INFO L218 NwaCegarLoop]: trace histogram [178, 178, 163, 163, 142, 135, 89, 89, 89, 89, 89, 89, 89, 81, 81, 81, 81, 81, 81, 81, 61, 46, 36, 28, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:12:57,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 04:12:57,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:12:57,392 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:12:57,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:12:57,394 INFO L85 PathProgramCache]: Analyzing trace with hash -278286544, now seen corresponding path program 13 times [2024-11-28 04:12:57,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:12:57,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17353072] [2024-11-28 04:12:57,394 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:12:57,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:12:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:13:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 163504 backedges. 1295 proven. 7025 refuted. 0 times theorem prover too weak. 155184 trivial. 0 not checked. [2024-11-28 04:13:03,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:13:03,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17353072] [2024-11-28 04:13:03,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17353072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:13:03,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597829735] [2024-11-28 04:13:03,201 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:13:03,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:13:03,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:13:03,206 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:13:03,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 04:13:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:13:04,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 5185 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 04:13:04,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:13:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 163504 backedges. 1043 proven. 9147 refuted. 0 times theorem prover too weak. 153314 trivial. 0 not checked. [2024-11-28 04:13:04,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:13:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 163504 backedges. 1043 proven. 9217 refuted. 0 times theorem prover too weak. 153244 trivial. 0 not checked. [2024-11-28 04:13:18,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597829735] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:13:18,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:13:18,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 25] total 33 [2024-11-28 04:13:18,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30536310] [2024-11-28 04:13:18,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:13:18,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 04:13:18,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:13:18,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 04:13:18,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 04:13:18,300 INFO L87 Difference]: Start difference. First operand 202 states and 317 transitions. Second operand has 33 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 33 states have internal predecessors, (108), 29 states have call successors, (33), 1 states have call predecessors, (33), 17 states have return successors, (47), 18 states have call predecessors, (47), 29 states have call successors, (47) [2024-11-28 04:13:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:13:18,922 INFO L93 Difference]: Finished difference Result 260 states and 547 transitions. [2024-11-28 04:13:18,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 04:13:18,922 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 33 states have internal predecessors, (108), 29 states have call successors, (33), 1 states have call predecessors, (33), 17 states have return successors, (47), 18 states have call predecessors, (47), 29 states have call successors, (47) Word has length 2327 [2024-11-28 04:13:18,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:13:18,931 INFO L225 Difference]: With dead ends: 260 [2024-11-28 04:13:18,931 INFO L226 Difference]: Without dead ends: 256 [2024-11-28 04:13:18,933 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4688 GetRequests, 4631 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=418, Invalid=1838, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 04:13:18,933 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 108 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:13:18,934 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 251 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:13:18,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-28 04:13:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 202. [2024-11-28 04:13:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 139 states have (on average 1.064748201438849) internal successors, (148), 135 states have internal predecessors, (148), 37 states have call successors, (37), 24 states have call predecessors, (37), 25 states have return successors, (141), 42 states have call predecessors, (141), 37 states have call successors, (141) [2024-11-28 04:13:18,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 326 transitions. [2024-11-28 04:13:18,976 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 326 transitions. Word has length 2327 [2024-11-28 04:13:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:13:18,978 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 326 transitions. [2024-11-28 04:13:18,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 33 states have internal predecessors, (108), 29 states have call successors, (33), 1 states have call predecessors, (33), 17 states have return successors, (47), 18 states have call predecessors, (47), 29 states have call successors, (47) [2024-11-28 04:13:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 326 transitions. [2024-11-28 04:13:19,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3717 [2024-11-28 04:13:19,075 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:13:19,076 INFO L218 NwaCegarLoop]: trace histogram [277, 277, 268, 268, 223, 219, 138, 138, 138, 138, 138, 138, 138, 134, 134, 134, 134, 134, 134, 134, 85, 85, 58, 45, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:13:19,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 04:13:19,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:13:19,276 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:13:19,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:13:19,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1340976988, now seen corresponding path program 14 times [2024-11-28 04:13:19,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:13:19,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128183680] [2024-11-28 04:13:19,278 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:13:19,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:13:20,480 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:13:20,480 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:13:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 418096 backedges. 2340 proven. 12657 refuted. 0 times theorem prover too weak. 403099 trivial. 0 not checked. [2024-11-28 04:13:33,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:13:33,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128183680] [2024-11-28 04:13:33,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128183680] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:13:33,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063943308] [2024-11-28 04:13:33,324 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:13:33,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:13:33,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:13:33,326 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:13:33,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 04:13:34,979 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:13:34,979 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:13:35,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 8269 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 04:13:35,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:13:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 418096 backedges. 1833 proven. 16208 refuted. 0 times theorem prover too weak. 400055 trivial. 0 not checked. [2024-11-28 04:13:35,375 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:13:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 418096 backedges. 1833 proven. 16293 refuted. 0 times theorem prover too weak. 399970 trivial. 0 not checked. [2024-11-28 04:13:56,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063943308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:13:56,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:13:56,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 27] total 35 [2024-11-28 04:13:56,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309270996] [2024-11-28 04:13:56,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:13:56,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 04:13:56,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:13:56,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 04:13:56,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 04:13:56,607 INFO L87 Difference]: Start difference. First operand 202 states and 326 transitions. Second operand has 35 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 35 states have internal predecessors, (114), 31 states have call successors, (35), 1 states have call predecessors, (35), 18 states have return successors, (50), 19 states have call predecessors, (50), 31 states have call successors, (50) [2024-11-28 04:13:57,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:13:57,244 INFO L93 Difference]: Finished difference Result 288 states and 720 transitions. [2024-11-28 04:13:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 04:13:57,245 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 35 states have internal predecessors, (114), 31 states have call successors, (35), 1 states have call predecessors, (35), 18 states have return successors, (50), 19 states have call predecessors, (50), 31 states have call successors, (50) Word has length 3716 [2024-11-28 04:13:57,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:13:57,256 INFO L225 Difference]: With dead ends: 288 [2024-11-28 04:13:57,256 INFO L226 Difference]: Without dead ends: 284 [2024-11-28 04:13:57,258 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7469 GetRequests, 7408 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=469, Invalid=2081, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 04:13:57,260 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:13:57,260 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 291 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:13:57,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-11-28 04:13:57,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 217. [2024-11-28 04:13:57,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 148 states have (on average 1.0608108108108107) internal successors, (157), 144 states have internal predecessors, (157), 40 states have call successors, (40), 24 states have call predecessors, (40), 28 states have return successors, (178), 48 states have call predecessors, (178), 40 states have call successors, (178) [2024-11-28 04:13:57,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 375 transitions. [2024-11-28 04:13:57,304 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 375 transitions. Word has length 3716 [2024-11-28 04:13:57,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:13:57,306 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 375 transitions. [2024-11-28 04:13:57,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 35 states have internal predecessors, (114), 31 states have call successors, (35), 1 states have call predecessors, (35), 18 states have return successors, (50), 19 states have call predecessors, (50), 31 states have call successors, (50) [2024-11-28 04:13:57,307 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 375 transitions. [2024-11-28 04:13:57,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7332 [2024-11-28 04:13:57,663 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:13:57,664 INFO L218 NwaCegarLoop]: trace histogram [554, 554, 521, 521, 454, 423, 277, 277, 277, 277, 277, 277, 277, 260, 260, 260, 260, 260, 260, 260, 194, 146, 100, 98, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:13:57,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 04:13:57,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:13:57,865 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:13:57,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:13:57,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1649858609, now seen corresponding path program 15 times [2024-11-28 04:13:57,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:13:57,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962883936] [2024-11-28 04:13:57,872 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:13:57,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:13:58,033 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-28 04:13:58,033 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:13:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1634232 backedges. 27560 proven. 77 refuted. 0 times theorem prover too weak. 1606595 trivial. 0 not checked. [2024-11-28 04:13:58,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:13:58,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962883936] [2024-11-28 04:13:58,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962883936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:13:58,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444989159] [2024-11-28 04:13:58,401 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:13:58,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:13:58,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:13:58,403 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:13:58,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 04:13:59,687 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-28 04:13:59,688 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:13:59,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:13:59,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:13:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1634232 backedges. 27968 proven. 86 refuted. 0 times theorem prover too weak. 1606178 trivial. 0 not checked. [2024-11-28 04:13:59,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:14:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1634232 backedges. 27968 proven. 92 refuted. 0 times theorem prover too weak. 1606172 trivial. 0 not checked. [2024-11-28 04:14:33,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444989159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:14:33,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:14:33,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 17] total 25 [2024-11-28 04:14:33,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165743076] [2024-11-28 04:14:33,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:14:33,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:14:33,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:14:33,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:14:33,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:14:33,311 INFO L87 Difference]: Start difference. First operand 217 states and 375 transitions. Second operand has 25 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 18 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-11-28 04:14:33,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:14:33,751 INFO L93 Difference]: Finished difference Result 434 states and 937 transitions. [2024-11-28 04:14:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 04:14:33,752 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 18 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 7331 [2024-11-28 04:14:33,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:14:33,757 INFO L225 Difference]: With dead ends: 434 [2024-11-28 04:14:33,757 INFO L226 Difference]: Without dead ends: 227 [2024-11-28 04:14:33,760 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14687 GetRequests, 14647 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 04:14:33,761 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 49 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:14:33,761 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 345 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:14:33,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-11-28 04:14:33,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2024-11-28 04:14:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 154 states have (on average 1.0584415584415585) internal successors, (163), 149 states have internal predecessors, (163), 42 states have call successors, (42), 27 states have call predecessors, (42), 27 states have return successors, (192), 47 states have call predecessors, (192), 42 states have call successors, (192) [2024-11-28 04:14:33,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 397 transitions. [2024-11-28 04:14:33,805 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 397 transitions. Word has length 7331 [2024-11-28 04:14:33,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:14:33,807 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 397 transitions. [2024-11-28 04:14:33,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 18 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-11-28 04:14:33,807 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 397 transitions. [2024-11-28 04:14:34,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7569 [2024-11-28 04:14:34,350 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:14:34,352 INFO L218 NwaCegarLoop]: trace histogram [558, 558, 553, 553, 450, 448, 279, 279, 279, 279, 279, 279, 279, 276, 276, 276, 276, 276, 276, 276, 172, 171, 110, 103, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:14:34,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 04:14:34,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:14:34,554 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:14:34,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:14:34,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1250735563, now seen corresponding path program 16 times [2024-11-28 04:14:34,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:14:34,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346082228] [2024-11-28 04:14:34,557 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:14:34,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:14:38,740 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:14:38,740 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:15:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1740201 backedges. 4828 proven. 36233 refuted. 0 times theorem prover too weak. 1699140 trivial. 0 not checked. [2024-11-28 04:15:16,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:15:16,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346082228] [2024-11-28 04:15:16,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346082228] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:15:16,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266093733] [2024-11-28 04:15:16,717 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:15:16,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:15:16,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:15:16,719 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:15:16,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 04:15:19,500 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:15:19,500 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:15:19,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 13466 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:15:19,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:15:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1740201 backedges. 115129 proven. 427 refuted. 0 times theorem prover too weak. 1624645 trivial. 0 not checked. [2024-11-28 04:15:19,876 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:15:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1740201 backedges. 4830 proven. 38323 refuted. 0 times theorem prover too weak. 1697048 trivial. 0 not checked. [2024-11-28 04:15:52,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266093733] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:15:52,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:15:52,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 30 [2024-11-28 04:15:52,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632607867] [2024-11-28 04:15:52,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:15:52,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 04:15:52,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:15:52,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 04:15:52,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:15:52,754 INFO L87 Difference]: Start difference. First operand 224 states and 397 transitions. Second operand has 30 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 30 states have internal predecessors, (112), 24 states have call successors, (34), 2 states have call predecessors, (34), 12 states have return successors, (41), 12 states have call predecessors, (41), 24 states have call successors, (41) [2024-11-28 04:15:53,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:15:53,579 INFO L93 Difference]: Finished difference Result 442 states and 879 transitions. [2024-11-28 04:15:53,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 04:15:53,579 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 30 states have internal predecessors, (112), 24 states have call successors, (34), 2 states have call predecessors, (34), 12 states have return successors, (41), 12 states have call predecessors, (41), 24 states have call successors, (41) Word has length 7568 [2024-11-28 04:15:53,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:15:53,584 INFO L225 Difference]: With dead ends: 442 [2024-11-28 04:15:53,584 INFO L226 Difference]: Without dead ends: 228 [2024-11-28 04:15:53,587 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15178 GetRequests, 15118 SyntacticMatches, 11 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 04:15:53,588 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 78 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:15:53,588 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 543 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:15:53,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-11-28 04:15:53,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 217. [2024-11-28 04:15:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 149 states have (on average 1.0469798657718121) internal successors, (156), 145 states have internal predecessors, (156), 41 states have call successors, (41), 26 states have call predecessors, (41), 26 states have return successors, (172), 45 states have call predecessors, (172), 41 states have call successors, (172) [2024-11-28 04:15:53,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 369 transitions. [2024-11-28 04:15:53,625 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 369 transitions. Word has length 7568 [2024-11-28 04:15:53,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:15:53,626 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 369 transitions. [2024-11-28 04:15:53,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 30 states have internal predecessors, (112), 24 states have call successors, (34), 2 states have call predecessors, (34), 12 states have return successors, (41), 12 states have call predecessors, (41), 24 states have call successors, (41) [2024-11-28 04:15:53,627 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 369 transitions. [2024-11-28 04:15:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6983 [2024-11-28 04:15:53,883 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:15:53,884 INFO L218 NwaCegarLoop]: trace histogram [520, 520, 505, 505, 416, 412, 260, 260, 260, 260, 260, 260, 260, 252, 252, 252, 252, 252, 252, 252, 160, 156, 108, 89, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:15:53,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-28 04:15:54,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:15:54,085 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:15:54,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:15:54,086 INFO L85 PathProgramCache]: Analyzing trace with hash -546000024, now seen corresponding path program 17 times [2024-11-28 04:15:54,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:15:54,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006345471] [2024-11-28 04:15:54,086 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:15:54,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:15:54,226 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-11-28 04:15:54,226 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:15:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1480970 backedges. 6540 proven. 33744 refuted. 0 times theorem prover too weak. 1440686 trivial. 0 not checked. [2024-11-28 04:15:54,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:15:54,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006345471] [2024-11-28 04:15:54,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006345471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:15:54,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167552226] [2024-11-28 04:15:54,918 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:15:54,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:15:54,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:15:54,920 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:15:54,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 04:15:56,217 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-11-28 04:15:56,217 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:15:56,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 04:15:56,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:15:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1480970 backedges. 333503 proven. 795 refuted. 0 times theorem prover too weak. 1146672 trivial. 0 not checked. [2024-11-28 04:15:56,610 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:16:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1480970 backedges. 6733 proven. 35470 refuted. 0 times theorem prover too weak. 1438767 trivial. 0 not checked. [2024-11-28 04:16:26,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167552226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:16:26,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:16:26,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 25] total 32 [2024-11-28 04:16:26,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647805761] [2024-11-28 04:16:26,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:16:26,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 04:16:26,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:16:26,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 04:16:26,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:16:26,116 INFO L87 Difference]: Start difference. First operand 217 states and 369 transitions. Second operand has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 25 states have call successors, (37), 2 states have call predecessors, (37), 13 states have return successors, (46), 15 states have call predecessors, (46), 25 states have call successors, (46) [2024-11-28 04:16:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:16:27,066 INFO L93 Difference]: Finished difference Result 438 states and 839 transitions. [2024-11-28 04:16:27,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-28 04:16:27,067 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 25 states have call successors, (37), 2 states have call predecessors, (37), 13 states have return successors, (46), 15 states have call predecessors, (46), 25 states have call successors, (46) Word has length 6982 [2024-11-28 04:16:27,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:16:27,071 INFO L225 Difference]: With dead ends: 438 [2024-11-28 04:16:27,071 INFO L226 Difference]: Without dead ends: 223 [2024-11-28 04:16:27,074 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14016 GetRequests, 13945 SyntacticMatches, 12 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=577, Invalid=3083, Unknown=0, NotChecked=0, Total=3660 [2024-11-28 04:16:27,075 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 127 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:16:27,075 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 469 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:16:27,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-28 04:16:27,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 213. [2024-11-28 04:16:27,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 146 states have (on average 1.047945205479452) internal successors, (153), 142 states have internal predecessors, (153), 40 states have call successors, (40), 25 states have call predecessors, (40), 26 states have return successors, (166), 45 states have call predecessors, (166), 40 states have call successors, (166) [2024-11-28 04:16:27,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 359 transitions. [2024-11-28 04:16:27,109 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 359 transitions. Word has length 6982 [2024-11-28 04:16:27,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:16:27,110 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 359 transitions. [2024-11-28 04:16:27,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 25 states have call successors, (37), 2 states have call predecessors, (37), 13 states have return successors, (46), 15 states have call predecessors, (46), 25 states have call successors, (46) [2024-11-28 04:16:27,110 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 359 transitions. [2024-11-28 04:16:27,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7788 [2024-11-28 04:16:27,515 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:16:27,516 INFO L218 NwaCegarLoop]: trace histogram [574, 574, 569, 569, 466, 459, 287, 287, 287, 287, 287, 287, 287, 284, 284, 284, 284, 284, 284, 284, 182, 172, 110, 108, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:16:27,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-28 04:16:27,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:16:27,716 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:16:27,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:16:27,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1539843527, now seen corresponding path program 18 times [2024-11-28 04:16:27,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:16:27,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385108189] [2024-11-28 04:16:27,721 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:16:27,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:16:27,921 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-11-28 04:16:27,921 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:16:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1842552 backedges. 4823 proven. 33486 refuted. 0 times theorem prover too weak. 1804243 trivial. 0 not checked. [2024-11-28 04:16:28,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:16:28,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385108189] [2024-11-28 04:16:28,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385108189] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:16:28,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879362202] [2024-11-28 04:16:28,895 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:16:28,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:16:28,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:16:28,898 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:16:28,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 04:16:30,413 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-11-28 04:16:30,413 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:16:30,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 04:16:30,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:16:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1842552 backedges. 4817 proven. 33478 refuted. 0 times theorem prover too weak. 1804257 trivial. 0 not checked. [2024-11-28 04:16:30,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1842552 backedges. 4823 proven. 33557 refuted. 0 times theorem prover too weak. 1804172 trivial. 0 not checked. [2024-11-28 04:17:05,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879362202] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:05,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:05,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 27] total 31 [2024-11-28 04:17:05,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650061482] [2024-11-28 04:17:05,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:05,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 04:17:05,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:05,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 04:17:05,177 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2024-11-28 04:17:05,178 INFO L87 Difference]: Start difference. First operand 213 states and 359 transitions. Second operand has 31 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 31 states have internal predecessors, (103), 27 states have call successors, (32), 1 states have call predecessors, (32), 13 states have return successors, (41), 15 states have call predecessors, (41), 27 states have call successors, (41) [2024-11-28 04:17:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:05,713 INFO L93 Difference]: Finished difference Result 301 states and 657 transitions. [2024-11-28 04:17:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 04:17:05,714 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), 27 states have call successors, (32), 1 states have call predecessors, (32), 13 states have return successors, (41), 15 states have call predecessors, (41), 27 states have call successors, (41) Word has length 7787 [2024-11-28 04:17:05,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:05,728 INFO L225 Difference]: With dead ends: 301 [2024-11-28 04:17:05,728 INFO L226 Difference]: Without dead ends: 297 [2024-11-28 04:17:05,729 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15610 GetRequests, 15558 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=316, Invalid=1406, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 04:17:05,730 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:05,730 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 301 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:17:05,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-11-28 04:17:05,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 261. [2024-11-28 04:17:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 176 states have (on average 1.0397727272727273) internal successors, (183), 172 states have internal predecessors, (183), 50 states have call successors, (50), 27 states have call predecessors, (50), 34 states have return successors, (305), 61 states have call predecessors, (305), 50 states have call successors, (305) [2024-11-28 04:17:05,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 538 transitions. [2024-11-28 04:17:05,778 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 538 transitions. Word has length 7787 [2024-11-28 04:17:05,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:05,783 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 538 transitions. [2024-11-28 04:17:05,783 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), 27 states have call successors, (32), 1 states have call predecessors, (32), 13 states have return successors, (41), 15 states have call predecessors, (41), 27 states have call successors, (41) [2024-11-28 04:17:05,783 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 538 transitions. [2024-11-28 04:17:06,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11521 [2024-11-28 04:17:06,522 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:06,523 INFO L218 NwaCegarLoop]: trace histogram [860, 860, 831, 831, 689, 681, 430, 430, 430, 430, 430, 430, 430, 415, 415, 415, 415, 415, 415, 415, 266, 259, 179, 142, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:06,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 04:17:06,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:06,724 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:17:06,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:06,728 INFO L85 PathProgramCache]: Analyzing trace with hash -658981797, now seen corresponding path program 19 times [2024-11-28 04:17:06,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:06,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105172201] [2024-11-28 04:17:06,728 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:17:06,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:19:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4038056 backedges. 6240 proven. 45723 refuted. 0 times theorem prover too weak. 3986093 trivial. 0 not checked. [2024-11-28 04:19:13,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:19:13,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105172201] [2024-11-28 04:19:13,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105172201] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:19:13,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358792223] [2024-11-28 04:19:13,846 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:19:13,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:19:13,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:19:13,848 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:19:13,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 04:19:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:19:18,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 25596 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 04:19:18,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:19:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4038056 backedges. 5728 proven. 55926 refuted. 0 times theorem prover too weak. 3976402 trivial. 0 not checked. [2024-11-28 04:19:19,069 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4038056 backedges. 5728 proven. 56028 refuted. 0 times theorem prover too weak. 3976300 trivial. 0 not checked. [2024-11-28 04:20:11,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358792223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:20:11,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:20:11,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 29] total 38 [2024-11-28 04:20:11,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312812280] [2024-11-28 04:20:11,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:11,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-28 04:20:11,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:11,938 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-28 04:20:11,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 04:20:11,939 INFO L87 Difference]: Start difference. First operand 261 states and 538 transitions. Second operand has 38 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 38 states have internal predecessors, (123), 34 states have call successors, (38), 1 states have call predecessors, (38), 20 states have return successors, (55), 21 states have call predecessors, (55), 34 states have call successors, (55) [2024-11-28 04:20:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:12,610 INFO L93 Difference]: Finished difference Result 435 states and 1674 transitions. [2024-11-28 04:20:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 04:20:12,611 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 38 states have internal predecessors, (123), 34 states have call successors, (38), 1 states have call predecessors, (38), 20 states have return successors, (55), 21 states have call predecessors, (55), 34 states have call successors, (55) Word has length 11520 [2024-11-28 04:20:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:12,633 INFO L225 Difference]: With dead ends: 435 [2024-11-28 04:20:12,633 INFO L226 Difference]: Without dead ends: 431 [2024-11-28 04:20:12,635 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23081 GetRequests, 23014 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=2518, Unknown=0, NotChecked=0, Total=3080 [2024-11-28 04:20:12,635 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 99 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:12,636 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 294 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:20:12,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2024-11-28 04:20:12,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 293. [2024-11-28 04:20:12,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 195 states have (on average 1.035897435897436) internal successors, (202), 191 states have internal predecessors, (202), 57 states have call successors, (57), 27 states have call predecessors, (57), 40 states have return successors, (451), 74 states have call predecessors, (451), 57 states have call successors, (451) [2024-11-28 04:20:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 710 transitions. [2024-11-28 04:20:12,730 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 710 transitions. Word has length 11520 [2024-11-28 04:20:12,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:12,736 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 710 transitions. [2024-11-28 04:20:12,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 38 states have internal predecessors, (123), 34 states have call successors, (38), 1 states have call predecessors, (38), 20 states have return successors, (55), 21 states have call predecessors, (55), 34 states have call successors, (55) [2024-11-28 04:20:12,736 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 710 transitions. [2024-11-28 04:20:13,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14134 [2024-11-28 04:20:13,871 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:13,874 INFO L218 NwaCegarLoop]: trace histogram [1039, 1039, 1036, 1036, 843, 836, 519, 519, 519, 519, 519, 519, 519, 518, 518, 518, 518, 518, 518, 518, 324, 318, 203, 193, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:13,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 04:20:14,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:14,074 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:20:14,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:14,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1142415271, now seen corresponding path program 20 times [2024-11-28 04:20:14,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:14,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836939167] [2024-11-28 04:20:14,080 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:20:14,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:28,627 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:20:28,627 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:25:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6078713 backedges. 33297 proven. 79487 refuted. 0 times theorem prover too weak. 5965929 trivial. 0 not checked. [2024-11-28 04:25:05,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:25:05,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836939167] [2024-11-28 04:25:05,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836939167] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:25:05,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835899909] [2024-11-28 04:25:05,377 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:25:05,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:25:05,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:25:05,383 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:25:05,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fac244a-eb18-4396-82b7-6250bb1b70d3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process