./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.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_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/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_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/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_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/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 1a779a25b3e5147f7c14d79ede7be3f2d2de62e2de15b88047fe2a162a63a762 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:02:36,497 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:02:36,595 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 05:02:36,602 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:02:36,602 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:02:36,642 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:02:36,643 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:02:36,643 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:02:36,644 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:02:36,645 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:02:36,646 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:02:36,646 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:02:36,647 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:02:36,647 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:02:36,647 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:02:36,648 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:02:36,648 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 05:02:36,648 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:02:36,648 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:02:36,649 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:02:36,649 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:02:36,649 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 05:02:36,649 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:02:36,649 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 05:02:36,649 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:02:36,649 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 05:02:36,650 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:02:36,650 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:02:36,650 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:02:36,650 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:02:36,650 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:02:36,650 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:02:36,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:02:36,651 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:02:36,652 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:02:36,652 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:02:36,652 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:02:36,652 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:02:36,652 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:02:36,652 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:02:36,652 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 05:02:36,653 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 05:02:36,653 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:02:36,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:02:36,653 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:02:36,653 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:02:36,653 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:02:36,653 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:02:36,653 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_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/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 -> 1a779a25b3e5147f7c14d79ede7be3f2d2de62e2de15b88047fe2a162a63a762 [2024-11-28 05:02:36,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:02:36,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:02:36,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:02:36,984 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:02:36,985 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:02:36,986 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c [2024-11-28 05:02:39,960 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/data/903bb784e/f680faf90abb40329ad10a26fba047fd/FLAG2c25dfa96 [2024-11-28 05:02:40,244 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:02:40,245 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c [2024-11-28 05:02:40,265 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/data/903bb784e/f680faf90abb40329ad10a26fba047fd/FLAG2c25dfa96 [2024-11-28 05:02:40,282 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/data/903bb784e/f680faf90abb40329ad10a26fba047fd [2024-11-28 05:02:40,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:02:40,286 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:02:40,288 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:02:40,288 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:02:40,293 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:02:40,294 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:02:40" (1/1) ... [2024-11-28 05:02:40,295 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a278b72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:40, skipping insertion in model container [2024-11-28 05:02:40,295 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:02:40" (1/1) ... [2024-11-28 05:02:40,315 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:02:40,492 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_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c[952,965] [2024-11-28 05:02:40,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:02:40,508 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:02:40,530 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_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/sv-benchmarks/c/recursive-simple/fibo_2calls_25-1.c[952,965] [2024-11-28 05:02:40,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:02:40,547 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:02:40,548 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:40 WrapperNode [2024-11-28 05:02:40,550 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:02:40,552 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:02:40,552 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:02:40,552 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:02:40,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:40" (1/1) ... [2024-11-28 05:02:40,570 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:40" (1/1) ... [2024-11-28 05:02:40,589 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-11-28 05:02:40,589 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:02:40,590 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:02:40,590 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:02:40,590 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:02:40,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:40" (1/1) ... [2024-11-28 05:02:40,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:40" (1/1) ... [2024-11-28 05:02:40,601 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:40" (1/1) ... [2024-11-28 05:02:40,622 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 05:02:40,622 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:40" (1/1) ... [2024-11-28 05:02:40,622 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:40" (1/1) ... [2024-11-28 05:02:40,625 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:40" (1/1) ... [2024-11-28 05:02:40,630 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:40" (1/1) ... [2024-11-28 05:02:40,632 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:40" (1/1) ... [2024-11-28 05:02:40,633 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:40" (1/1) ... [2024-11-28 05:02:40,636 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:40" (1/1) ... [2024-11-28 05:02:40,637 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:02:40,638 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:02:40,638 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:02:40,638 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:02:40,640 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:40" (1/1) ... [2024-11-28 05:02:40,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:02:40,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:40,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:02:40,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:02:40,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:02:40,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:02:40,718 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-11-28 05:02:40,719 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-11-28 05:02:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-11-28 05:02:40,719 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-11-28 05:02:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:02:40,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:02:40,789 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:02:40,793 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:02:40,951 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-28 05:02:40,952 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:02:40,962 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:02:40,962 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-28 05:02:40,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:02:40 BoogieIcfgContainer [2024-11-28 05:02:40,963 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:02:40,965 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:02:40,966 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:02:40,971 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:02:40,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:02:40" (1/3) ... [2024-11-28 05:02:40,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ce0095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:02:40, skipping insertion in model container [2024-11-28 05:02:40,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:40" (2/3) ... [2024-11-28 05:02:40,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ce0095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:02:40, skipping insertion in model container [2024-11-28 05:02:40,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:02:40" (3/3) ... [2024-11-28 05:02:40,974 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_25-1.c [2024-11-28 05:02:40,988 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:02:40,989 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_25-1.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-28 05:02:41,040 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:02:41,052 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;@3bad0d51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:02:41,053 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 05:02:41,057 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 05:02:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 05:02:41,063 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:41,064 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:41,064 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:41,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:41,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2024-11-28 05:02:41,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:41,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669171185] [2024-11-28 05:02:41,079 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:41,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:41,315 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 05:02:41,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:41,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669171185] [2024-11-28 05:02:41,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669171185] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:41,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:41,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:02:41,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454233821] [2024-11-28 05:02:41,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:41,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:02:41,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:41,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:02:41,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:02:41,345 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, 5 states have (on average 1.6) internal successors, (8), 4 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 05:02:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:41,396 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-11-28 05:02:41,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:02:41,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 05:02:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:41,406 INFO L225 Difference]: With dead ends: 39 [2024-11-28 05:02:41,406 INFO L226 Difference]: Without dead ends: 27 [2024-11-28 05:02:41,409 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 05:02:41,412 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:41,413 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:02:41,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-28 05:02:41,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-28 05:02:41,444 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 05:02:41,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-28 05:02:41,450 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2024-11-28 05:02:41,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:41,450 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-28 05:02:41,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 05:02:41,451 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-28 05:02:41,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 05:02:41,452 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:41,452 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:41,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:02:41,454 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:41,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:41,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2024-11-28 05:02:41,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:41,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954232464] [2024-11-28 05:02:41,457 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:41,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:41,538 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 05:02:41,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:41,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954232464] [2024-11-28 05:02:41,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954232464] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:41,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:41,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:02:41,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848539889] [2024-11-28 05:02:41,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:41,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:02:41,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:41,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:02:41,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:02:41,541 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 05:02:41,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:41,573 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-11-28 05:02:41,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:02:41,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 05:02:41,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:41,574 INFO L225 Difference]: With dead ends: 33 [2024-11-28 05:02:41,575 INFO L226 Difference]: Without dead ends: 29 [2024-11-28 05:02:41,575 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 05:02:41,576 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:41,576 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:02:41,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-28 05:02:41,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-28 05:02:41,582 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 05:02:41,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-28 05:02:41,583 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2024-11-28 05:02:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:41,583 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-28 05:02:41,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 05:02:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-28 05:02:41,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 05:02:41,584 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:41,585 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 05:02:41,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:02:41,585 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:41,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:41,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2024-11-28 05:02:41,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:41,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234601937] [2024-11-28 05:02:41,586 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:41,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:41,817 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 05:02:41,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:41,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234601937] [2024-11-28 05:02:41,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234601937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:41,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237957999] [2024-11-28 05:02:41,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:41,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:41,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:41,825 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:41,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:02:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:41,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:02:41,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:42,061 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 05:02:42,062 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:42,349 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 05:02:42,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237957999] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:42,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:42,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-11-28 05:02:42,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582550883] [2024-11-28 05:02:42,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:42,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:02:42,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:42,352 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:02:42,352 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:02:42,352 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 05:02:42,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:42,541 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2024-11-28 05:02:42,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:02:42,542 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 05:02:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:42,543 INFO L225 Difference]: With dead ends: 55 [2024-11-28 05:02:42,543 INFO L226 Difference]: Without dead ends: 31 [2024-11-28 05:02:42,545 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 05:02:42,546 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:42,546 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 105 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:02:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-28 05:02:42,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-11-28 05:02:42,558 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 05:02:42,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-28 05:02:42,559 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2024-11-28 05:02:42,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:42,559 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-28 05:02:42,559 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 05:02:42,562 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-28 05:02:42,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 05:02:42,563 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:42,564 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 05:02:42,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:02:42,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:42,764 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:42,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:42,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2024-11-28 05:02:42,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:42,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094381045] [2024-11-28 05:02:42,765 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:42,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:42,896 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 05:02:42,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:42,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094381045] [2024-11-28 05:02:42,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094381045] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:42,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549152509] [2024-11-28 05:02:42,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:42,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:42,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:42,899 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:42,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:02:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:42,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:02:42,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:42,994 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 05:02:42,995 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:43,243 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 05:02:43,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549152509] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:43,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:43,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-11-28 05:02:43,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130072947] [2024-11-28 05:02:43,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:43,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:02:43,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:43,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:02:43,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:02:43,246 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 05:02:43,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:43,401 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-11-28 05:02:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:02:43,402 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 05:02:43,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:43,403 INFO L225 Difference]: With dead ends: 40 [2024-11-28 05:02:43,403 INFO L226 Difference]: Without dead ends: 36 [2024-11-28 05:02:43,404 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 05:02:43,404 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:43,405 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:02:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-28 05:02:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2024-11-28 05:02:43,412 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 05:02:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-11-28 05:02:43,413 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2024-11-28 05:02:43,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:43,414 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-11-28 05:02:43,414 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 05:02:43,414 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-11-28 05:02:43,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 05:02:43,415 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:43,415 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 05:02:43,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 05:02:43,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:43,620 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:43,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:43,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2024-11-28 05:02:43,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:43,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918033987] [2024-11-28 05:02:43,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:43,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:43,782 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 05:02:43,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:43,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918033987] [2024-11-28 05:02:43,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918033987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:43,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019480481] [2024-11-28 05:02:43,782 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:43,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:43,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:43,786 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:43,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:02:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:43,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:02:43,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:43,944 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 05:02:43,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:44,390 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 05:02:44,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019480481] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:44,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:44,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2024-11-28 05:02:44,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140825744] [2024-11-28 05:02:44,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:44,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 05:02:44,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:44,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 05:02:44,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:02:44,393 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 05:02:44,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:44,600 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2024-11-28 05:02:44,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:02:44,601 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 05:02:44,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:44,602 INFO L225 Difference]: With dead ends: 69 [2024-11-28 05:02:44,602 INFO L226 Difference]: Without dead ends: 38 [2024-11-28 05:02:44,603 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 05:02:44,607 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:44,607 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:02:44,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-28 05:02:44,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-11-28 05:02:44,621 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 05:02:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-11-28 05:02:44,623 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2024-11-28 05:02:44,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:44,624 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-11-28 05:02:44,624 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 05:02:44,624 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2024-11-28 05:02:44,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 05:02:44,626 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:44,626 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 05:02:44,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 05:02:44,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:44,827 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:44,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:44,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2024-11-28 05:02:44,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:44,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540087694] [2024-11-28 05:02:44,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:44,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:44,996 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 05:02:44,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:44,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540087694] [2024-11-28 05:02:44,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540087694] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:44,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610453473] [2024-11-28 05:02:44,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:44,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:44,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:45,001 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:45,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:02:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:45,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:02:45,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:45,165 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 05:02:45,165 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:45,578 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 05:02:45,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610453473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:45,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:45,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2024-11-28 05:02:45,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598579430] [2024-11-28 05:02:45,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:45,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:02:45,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:45,580 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:02:45,580 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:02:45,581 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 05:02:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:46,088 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2024-11-28 05:02:46,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:02:46,089 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 05:02:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:46,090 INFO L225 Difference]: With dead ends: 101 [2024-11-28 05:02:46,090 INFO L226 Difference]: Without dead ends: 68 [2024-11-28 05:02:46,092 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:02:46,093 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:46,093 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 300 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:02:46,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-28 05:02:46,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2024-11-28 05:02:46,106 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 05:02:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2024-11-28 05:02:46,108 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2024-11-28 05:02:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:46,108 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2024-11-28 05:02:46,109 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 05:02:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2024-11-28 05:02:46,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 05:02:46,111 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:46,111 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 05:02:46,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 05:02:46,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:46,316 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:46,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:46,316 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2024-11-28 05:02:46,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:46,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419335736] [2024-11-28 05:02:46,317 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:46,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:46,465 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 05:02:46,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:46,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419335736] [2024-11-28 05:02:46,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419335736] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:46,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694930996] [2024-11-28 05:02:46,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:46,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:46,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:46,469 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:46,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:02:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:46,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 05:02:46,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:46,651 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 05:02:46,651 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:47,275 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 05:02:47,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694930996] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:47,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:47,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2024-11-28 05:02:47,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321854658] [2024-11-28 05:02:47,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:47,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 05:02:47,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:47,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 05:02:47,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-28 05:02:47,278 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 05:02:47,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:47,536 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2024-11-28 05:02:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:02:47,537 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 05:02:47,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:47,539 INFO L225 Difference]: With dead ends: 102 [2024-11-28 05:02:47,539 INFO L226 Difference]: Without dead ends: 98 [2024-11-28 05:02:47,540 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-11-28 05:02:47,544 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:47,545 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 161 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:02:47,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-28 05:02:47,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2024-11-28 05:02:47,588 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 05:02:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2024-11-28 05:02:47,592 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2024-11-28 05:02:47,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:47,592 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2024-11-28 05:02:47,592 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 05:02:47,593 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2024-11-28 05:02:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-28 05:02:47,600 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:47,600 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:47,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 05:02:47,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 05:02:47,801 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:47,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:47,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1770426885, now seen corresponding path program 1 times [2024-11-28 05:02:47,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:47,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135950923] [2024-11-28 05:02:47,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:47,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-11-28 05:02:48,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:48,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135950923] [2024-11-28 05:02:48,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135950923] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:48,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007309995] [2024-11-28 05:02:48,095 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:48,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:48,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:48,097 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:48,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:02:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:48,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 05:02:48,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-28 05:02:48,352 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 129 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-28 05:02:49,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007309995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:49,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:49,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2024-11-28 05:02:49,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325311026] [2024-11-28 05:02:49,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:49,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 05:02:49,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:49,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 05:02:49,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:02:49,518 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 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 05:02:50,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:50,287 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2024-11-28 05:02:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:02:50,288 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 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 107 [2024-11-28 05:02:50,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:50,291 INFO L225 Difference]: With dead ends: 177 [2024-11-28 05:02:50,293 INFO L226 Difference]: Without dead ends: 104 [2024-11-28 05:02:50,296 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 05:02:50,297 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:50,301 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 352 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 05:02:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-28 05:02:50,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2024-11-28 05:02:50,332 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 05:02:50,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2024-11-28 05:02:50,334 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 107 [2024-11-28 05:02:50,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:50,334 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2024-11-28 05:02:50,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 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 05:02:50,334 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2024-11-28 05:02:50,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-11-28 05:02:50,341 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:50,341 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 9, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:50,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 05:02:50,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 05:02:50,542 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:50,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:50,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1566869308, now seen corresponding path program 1 times [2024-11-28 05:02:50,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:50,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874134523] [2024-11-28 05:02:50,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:50,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2024-11-28 05:02:50,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:50,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874134523] [2024-11-28 05:02:50,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874134523] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:50,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343039774] [2024-11-28 05:02:50,901 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:50,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:50,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:50,903 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:50,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:02:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:51,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:02:51,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2024-11-28 05:02:51,165 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 29 proven. 228 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2024-11-28 05:02:52,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343039774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:52,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:52,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2024-11-28 05:02:52,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600574760] [2024-11-28 05:02:52,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:52,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 05:02:52,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:52,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 05:02:52,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:02:52,732 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 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 05:02:53,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:53,096 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2024-11-28 05:02:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:02:53,097 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 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 146 [2024-11-28 05:02:53,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:53,100 INFO L225 Difference]: With dead ends: 132 [2024-11-28 05:02:53,100 INFO L226 Difference]: Without dead ends: 128 [2024-11-28 05:02:53,101 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 276 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2024-11-28 05:02:53,102 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:53,102 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 209 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:02:53,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-28 05:02:53,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2024-11-28 05:02:53,143 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 05:02:53,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2024-11-28 05:02:53,151 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 146 [2024-11-28 05:02:53,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:53,151 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2024-11-28 05:02:53,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 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 05:02:53,152 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2024-11-28 05:02:53,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2024-11-28 05:02:53,158 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:53,159 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 05:02:53,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 05:02:53,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-28 05:02:53,360 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:53,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:53,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1279109938, now seen corresponding path program 2 times [2024-11-28 05:02:53,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:53,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498612796] [2024-11-28 05:02:53,361 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:02:53,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:53,423 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:02:53,426 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:53,963 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 05:02:53,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:53,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498612796] [2024-11-28 05:02:53,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498612796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:53,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362369208] [2024-11-28 05:02:53,963 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:02:53,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:53,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:53,965 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:53,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:02:54,129 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:02:54,130 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:54,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 05:02:54,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:54,339 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 05:02:54,339 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:56,831 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 05:02:56,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362369208] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:56,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:56,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17] total 29 [2024-11-28 05:02:56,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96242747] [2024-11-28 05:02:56,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:56,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:02:56,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:56,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:02:56,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:02:56,835 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 05:02:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:57,801 INFO L93 Difference]: Finished difference Result 323 states and 666 transitions. [2024-11-28 05:02:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 05:02:57,802 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 05:02:57,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:57,806 INFO L225 Difference]: With dead ends: 323 [2024-11-28 05:02:57,806 INFO L226 Difference]: Without dead ends: 214 [2024-11-28 05:02:57,808 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 547 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 05:02:57,809 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 129 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:57,810 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 481 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 05:02:57,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-28 05:02:57,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 184. [2024-11-28 05:02:57,840 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 05:02:57,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 301 transitions. [2024-11-28 05:02:57,844 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 301 transitions. Word has length 284 [2024-11-28 05:02:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:57,846 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 301 transitions. [2024-11-28 05:02:57,846 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 05:02:57,846 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 301 transitions. [2024-11-28 05:02:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2024-11-28 05:02:57,856 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:57,856 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 23, 23, 20, 18, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:57,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 05:02:58,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 05:02:58,060 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:58,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:58,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1509408310, now seen corresponding path program 3 times [2024-11-28 05:02:58,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:58,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053609973] [2024-11-28 05:02:58,061 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:02:58,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:58,126 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 05:02:58,126 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 488 proven. 80 refuted. 0 times theorem prover too weak. 2619 trivial. 0 not checked. [2024-11-28 05:02:58,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:58,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053609973] [2024-11-28 05:02:58,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053609973] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:58,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979281841] [2024-11-28 05:02:58,357 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:02:58,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:58,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:58,359 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:58,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:02:58,511 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 05:02:58,511 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:58,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 05:02:58,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 496 proven. 83 refuted. 0 times theorem prover too weak. 2608 trivial. 0 not checked. [2024-11-28 05:02:58,607 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 500 proven. 89 refuted. 0 times theorem prover too weak. 2598 trivial. 0 not checked. [2024-11-28 05:03:00,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979281841] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:00,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:00,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 18 [2024-11-28 05:03:00,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769116619] [2024-11-28 05:03:00,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:00,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:03:00,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:00,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:03:00,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:03:00,079 INFO L87 Difference]: Start difference. First operand 184 states and 301 transitions. Second operand has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2024-11-28 05:03:00,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:03:00,323 INFO L93 Difference]: Finished difference Result 255 states and 465 transitions. [2024-11-28 05:03:00,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:03:00,324 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), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) Word has length 336 [2024-11-28 05:03:00,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:03:00,329 INFO L225 Difference]: With dead ends: 255 [2024-11-28 05:03:00,329 INFO L226 Difference]: Without dead ends: 251 [2024-11-28 05:03:00,330 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 662 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-11-28 05:03:00,331 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:03:00,331 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 164 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:03:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-28 05:03:00,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 224. [2024-11-28 05:03:00,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 149 states have internal predecessors, (173), 45 states have call successors, (45), 20 states have call predecessors, (45), 30 states have return successors, (187), 54 states have call predecessors, (187), 45 states have call successors, (187) [2024-11-28 05:03:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 405 transitions. [2024-11-28 05:03:00,387 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 405 transitions. Word has length 336 [2024-11-28 05:03:00,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:03:00,388 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 405 transitions. [2024-11-28 05:03:00,388 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), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2024-11-28 05:03:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 405 transitions. [2024-11-28 05:03:00,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2024-11-28 05:03:00,394 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:03:00,394 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 30, 29, 29, 24, 21, 21, 21, 21, 21, 21, 21, 16, 14, 14, 14, 14, 14, 14, 14, 12, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:00,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 05:03:00,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:00,598 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:03:00,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:00,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1192940537, now seen corresponding path program 4 times [2024-11-28 05:03:00,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:00,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952757651] [2024-11-28 05:03:00,599 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:03:00,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:00,660 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:03:00,660 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 182 proven. 720 refuted. 0 times theorem prover too weak. 6081 trivial. 0 not checked. [2024-11-28 05:03:01,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:01,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952757651] [2024-11-28 05:03:01,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952757651] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:01,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033128183] [2024-11-28 05:03:01,033 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:03:01,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:01,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:01,036 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:01,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:03:01,264 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:03:01,264 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:01,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:03:01,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 1267 proven. 6 refuted. 0 times theorem prover too weak. 5710 trivial. 0 not checked. [2024-11-28 05:03:01,349 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 188 proven. 860 refuted. 0 times theorem prover too weak. 5935 trivial. 0 not checked. [2024-11-28 05:03:03,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033128183] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:03,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:03,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-11-28 05:03:03,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794162905] [2024-11-28 05:03:03,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:03,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:03:03,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:03,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:03:03,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:03:03,132 INFO L87 Difference]: Start difference. First operand 224 states and 405 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-28 05:03:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:03:03,325 INFO L93 Difference]: Finished difference Result 412 states and 767 transitions. [2024-11-28 05:03:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:03:03,326 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) Word has length 484 [2024-11-28 05:03:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:03:03,329 INFO L225 Difference]: With dead ends: 412 [2024-11-28 05:03:03,329 INFO L226 Difference]: Without dead ends: 193 [2024-11-28 05:03:03,332 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 958 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:03:03,333 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:03:03,333 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 153 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:03:03,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-11-28 05:03:03,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2024-11-28 05:03:03,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 125 states have (on average 1.16) internal successors, (145), 124 states have internal predecessors, (145), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (112), 42 states have call predecessors, (112), 37 states have call successors, (112) [2024-11-28 05:03:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 294 transitions. [2024-11-28 05:03:03,362 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 294 transitions. Word has length 484 [2024-11-28 05:03:03,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:03:03,363 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 294 transitions. [2024-11-28 05:03:03,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-28 05:03:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 294 transitions. [2024-11-28 05:03:03,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2024-11-28 05:03:03,367 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:03:03,367 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 21, 20, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 8, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:03,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:03,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:03,571 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:03:03,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:03,572 INFO L85 PathProgramCache]: Analyzing trace with hash -240108639, now seen corresponding path program 5 times [2024-11-28 05:03:03,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:03,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274317862] [2024-11-28 05:03:03,572 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:03:03,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:03,596 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:03:03,600 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 183 proven. 538 refuted. 0 times theorem prover too weak. 2755 trivial. 0 not checked. [2024-11-28 05:03:03,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:03,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274317862] [2024-11-28 05:03:03,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274317862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:03,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190997621] [2024-11-28 05:03:03,747 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:03:03,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:03,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:03,749 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:03,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:03:03,871 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:03:03,872 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:03,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:03:03,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 1045 proven. 13 refuted. 0 times theorem prover too weak. 2418 trivial. 0 not checked. [2024-11-28 05:03:03,962 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 183 proven. 538 refuted. 0 times theorem prover too weak. 2755 trivial. 0 not checked. [2024-11-28 05:03:05,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190997621] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:05,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:05,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2024-11-28 05:03:05,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630857126] [2024-11-28 05:03:05,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:05,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 05:03:05,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:05,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 05:03:05,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-11-28 05:03:05,401 INFO L87 Difference]: Start difference. First operand 186 states and 294 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-28 05:03:05,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:03:05,555 INFO L93 Difference]: Finished difference Result 345 states and 585 transitions. [2024-11-28 05:03:05,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:03:05,556 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) Word has length 351 [2024-11-28 05:03:05,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:03:05,558 INFO L225 Difference]: With dead ends: 345 [2024-11-28 05:03:05,558 INFO L226 Difference]: Without dead ends: 147 [2024-11-28 05:03:05,560 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 692 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:03:05,561 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:03:05,561 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 163 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:03:05,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-28 05:03:05,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-11-28 05:03:05,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 100 states have internal predecessors, (118), 27 states have call successors, (27), 17 states have call predecessors, (27), 18 states have return successors, (77), 29 states have call predecessors, (77), 27 states have call successors, (77) [2024-11-28 05:03:05,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 222 transitions. [2024-11-28 05:03:05,579 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 222 transitions. Word has length 351 [2024-11-28 05:03:05,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:03:05,579 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 222 transitions. [2024-11-28 05:03:05,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-28 05:03:05,579 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 222 transitions. [2024-11-28 05:03:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2024-11-28 05:03:05,582 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:03:05,582 INFO L218 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 21, 18, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:05,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:05,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 05:03:05,786 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:03:05,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:05,787 INFO L85 PathProgramCache]: Analyzing trace with hash 684608424, now seen corresponding path program 6 times [2024-11-28 05:03:05,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:05,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820189779] [2024-11-28 05:03:05,788 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:03:05,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:05,852 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-28 05:03:05,852 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3195 backedges. 219 proven. 588 refuted. 0 times theorem prover too weak. 2388 trivial. 0 not checked. [2024-11-28 05:03:06,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:06,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820189779] [2024-11-28 05:03:06,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820189779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:06,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934296930] [2024-11-28 05:03:06,113 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:03:06,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:06,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:06,115 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:06,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:03:06,293 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-28 05:03:06,293 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:06,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 05:03:06,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3195 backedges. 1436 proven. 46 refuted. 0 times theorem prover too weak. 1713 trivial. 0 not checked. [2024-11-28 05:03:06,369 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3195 backedges. 219 proven. 589 refuted. 0 times theorem prover too weak. 2387 trivial. 0 not checked. [2024-11-28 05:03:08,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934296930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:08,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:08,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 17 [2024-11-28 05:03:08,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565920153] [2024-11-28 05:03:08,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:08,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 05:03:08,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:08,061 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 05:03:08,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-28 05:03:08,062 INFO L87 Difference]: Start difference. First operand 147 states and 222 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 10 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2024-11-28 05:03:08,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:03:08,378 INFO L93 Difference]: Finished difference Result 312 states and 512 transitions. [2024-11-28 05:03:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:03:08,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 10 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 337 [2024-11-28 05:03:08,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:03:08,381 INFO L225 Difference]: With dead ends: 312 [2024-11-28 05:03:08,382 INFO L226 Difference]: Without dead ends: 172 [2024-11-28 05:03:08,383 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 664 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2024-11-28 05:03:08,384 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:03:08,384 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 317 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:03:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-28 05:03:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 166. [2024-11-28 05:03:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 111 states have internal predecessors, (132), 29 states have call successors, (29), 20 states have call predecessors, (29), 21 states have return successors, (97), 34 states have call predecessors, (97), 29 states have call successors, (97) [2024-11-28 05:03:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 258 transitions. [2024-11-28 05:03:08,406 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 258 transitions. Word has length 337 [2024-11-28 05:03:08,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:03:08,408 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 258 transitions. [2024-11-28 05:03:08,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 10 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2024-11-28 05:03:08,408 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 258 transitions. [2024-11-28 05:03:08,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2024-11-28 05:03:08,412 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:03:08,412 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 33, 33, 32, 31, 21, 21, 21, 21, 21, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:08,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 05:03:08,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:08,616 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:03:08,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash 268905289, now seen corresponding path program 7 times [2024-11-28 05:03:08,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:08,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547618951] [2024-11-28 05:03:08,617 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:03:08,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:03:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7837 backedges. 274 proven. 870 refuted. 0 times theorem prover too weak. 6693 trivial. 0 not checked. [2024-11-28 05:03:09,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:09,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547618951] [2024-11-28 05:03:09,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547618951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:09,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682659607] [2024-11-28 05:03:09,387 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:03:09,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:09,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:09,389 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:09,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:03:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:03:09,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:03:09,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7837 backedges. 209 proven. 1294 refuted. 0 times theorem prover too weak. 6334 trivial. 0 not checked. [2024-11-28 05:03:09,920 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7837 backedges. 209 proven. 1327 refuted. 0 times theorem prover too weak. 6301 trivial. 0 not checked. [2024-11-28 05:03:13,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682659607] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:13,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:13,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 19] total 26 [2024-11-28 05:03:13,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53692913] [2024-11-28 05:03:13,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:13,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:03:13,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:13,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:03:13,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:03:13,758 INFO L87 Difference]: Start difference. First operand 166 states and 258 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 05:03:14,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:03:14,156 INFO L93 Difference]: Finished difference Result 218 states and 397 transitions. [2024-11-28 05:03:14,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:03:14,156 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 517 [2024-11-28 05:03:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:03:14,164 INFO L225 Difference]: With dead ends: 218 [2024-11-28 05:03:14,164 INFO L226 Difference]: Without dead ends: 214 [2024-11-28 05:03:14,167 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 1015 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 05:03:14,168 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:03:14,168 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 209 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:03:14,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-28 05:03:14,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 203. [2024-11-28 05:03:14,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 137 states have (on average 1.1240875912408759) internal successors, (154), 133 states have internal predecessors, (154), 37 states have call successors, (37), 20 states have call predecessors, (37), 28 states have return successors, (169), 49 states have call predecessors, (169), 37 states have call successors, (169) [2024-11-28 05:03:14,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 360 transitions. [2024-11-28 05:03:14,198 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 360 transitions. Word has length 517 [2024-11-28 05:03:14,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:03:14,199 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 360 transitions. [2024-11-28 05:03:14,199 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 05:03:14,199 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 360 transitions. [2024-11-28 05:03:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2024-11-28 05:03:14,208 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:03:14,208 INFO L218 NwaCegarLoop]: trace histogram [64, 64, 63, 63, 63, 50, 32, 32, 32, 32, 32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 18, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:14,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 05:03:14,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:14,412 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:03:14,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:14,413 INFO L85 PathProgramCache]: Analyzing trace with hash 2065550717, now seen corresponding path program 8 times [2024-11-28 05:03:14,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:14,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927709692] [2024-11-28 05:03:14,413 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:03:14,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:14,606 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:14,606 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 22898 backedges. 459 proven. 1882 refuted. 0 times theorem prover too weak. 20557 trivial. 0 not checked. [2024-11-28 05:03:16,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:16,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927709692] [2024-11-28 05:03:16,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927709692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:16,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637853153] [2024-11-28 05:03:16,054 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:03:16,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:16,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:16,056 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:16,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:03:16,487 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:16,487 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:16,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 1969 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 05:03:16,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 22898 backedges. 341 proven. 2658 refuted. 0 times theorem prover too weak. 19899 trivial. 0 not checked. [2024-11-28 05:03:16,690 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 22898 backedges. 341 proven. 2702 refuted. 0 times theorem prover too weak. 19855 trivial. 0 not checked. [2024-11-28 05:03:21,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637853153] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:21,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:21,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 21] total 28 [2024-11-28 05:03:21,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629375740] [2024-11-28 05:03:21,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:21,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:03:21,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:21,974 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:03:21,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:03:21,975 INFO L87 Difference]: Start difference. First operand 203 states and 360 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 05:03:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:03:22,480 INFO L93 Difference]: Finished difference Result 252 states and 524 transitions. [2024-11-28 05:03:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:03:22,481 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 879 [2024-11-28 05:03:22,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:03:22,487 INFO L225 Difference]: With dead ends: 252 [2024-11-28 05:03:22,487 INFO L226 Difference]: Without dead ends: 248 [2024-11-28 05:03:22,489 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1785 GetRequests, 1738 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 05:03:22,489 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 107 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:03:22,490 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 214 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:03:22,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-28 05:03:22,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 187. [2024-11-28 05:03:22,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 128 states have (on average 1.1328125) internal successors, (145), 124 states have internal predecessors, (145), 32 states have call successors, (32), 20 states have call predecessors, (32), 26 states have return successors, (131), 42 states have call predecessors, (131), 32 states have call successors, (131) [2024-11-28 05:03:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 308 transitions. [2024-11-28 05:03:22,525 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 308 transitions. Word has length 879 [2024-11-28 05:03:22,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:03:22,526 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 308 transitions. [2024-11-28 05:03:22,527 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 05:03:22,527 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 308 transitions. [2024-11-28 05:03:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1400 [2024-11-28 05:03:22,543 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:03:22,543 INFO L218 NwaCegarLoop]: trace histogram [102, 102, 101, 101, 90, 87, 51, 51, 51, 51, 51, 51, 51, 50, 50, 50, 50, 50, 50, 50, 40, 36, 14, 12, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:22,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:22,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 05:03:22,744 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:03:22,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:22,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1740069691, now seen corresponding path program 9 times [2024-11-28 05:03:22,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:22,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927993880] [2024-11-28 05:03:22,745 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:03:22,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:22,795 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:03:22,795 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 58550 backedges. 2098 proven. 2 refuted. 0 times theorem prover too weak. 56450 trivial. 0 not checked. [2024-11-28 05:03:22,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:22,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927993880] [2024-11-28 05:03:22,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927993880] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:22,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413626962] [2024-11-28 05:03:22,864 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:03:22,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:22,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:22,867 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:22,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 05:03:23,241 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:03:23,241 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:23,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:03:23,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 58550 backedges. 2096 proven. 4 refuted. 0 times theorem prover too weak. 56450 trivial. 0 not checked. [2024-11-28 05:03:23,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 58550 backedges. 2096 proven. 4 refuted. 0 times theorem prover too weak. 56450 trivial. 0 not checked. [2024-11-28 05:03:27,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413626962] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:27,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:27,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2024-11-28 05:03:27,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069763511] [2024-11-28 05:03:27,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:27,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:03:27,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:27,325 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:03:27,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:03:27,326 INFO L87 Difference]: Start difference. First operand 187 states and 308 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-28 05:03:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:03:27,432 INFO L93 Difference]: Finished difference Result 367 states and 676 transitions. [2024-11-28 05:03:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:03:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 1399 [2024-11-28 05:03:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:03:27,436 INFO L225 Difference]: With dead ends: 367 [2024-11-28 05:03:27,436 INFO L226 Difference]: Without dead ends: 182 [2024-11-28 05:03:27,438 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2807 GetRequests, 2792 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:03:27,439 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:03:27,439 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 113 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:03:27,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-28 05:03:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2024-11-28 05:03:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 125 states have (on average 1.136) internal successors, (142), 121 states have internal predecessors, (142), 31 states have call successors, (31), 20 states have call predecessors, (31), 25 states have return successors, (111), 40 states have call predecessors, (111), 31 states have call successors, (111) [2024-11-28 05:03:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 284 transitions. [2024-11-28 05:03:27,460 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 284 transitions. Word has length 1399 [2024-11-28 05:03:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:03:27,461 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 284 transitions. [2024-11-28 05:03:27,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-28 05:03:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 284 transitions. [2024-11-28 05:03:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1687 [2024-11-28 05:03:27,481 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:03:27,482 INFO L218 NwaCegarLoop]: trace histogram [125, 125, 122, 122, 102, 98, 62, 62, 62, 62, 62, 62, 62, 61, 61, 61, 61, 61, 61, 61, 41, 36, 24, 23, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:27,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 05:03:27,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 05:03:27,683 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:03:27,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:27,683 INFO L85 PathProgramCache]: Analyzing trace with hash 754426269, now seen corresponding path program 10 times [2024-11-28 05:03:27,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:27,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751529189] [2024-11-28 05:03:27,684 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:03:27,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:28,107 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:03:28,107 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 85312 backedges. 1035 proven. 5630 refuted. 0 times theorem prover too weak. 78647 trivial. 0 not checked. [2024-11-28 05:03:31,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:31,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751529189] [2024-11-28 05:03:31,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751529189] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:31,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482833399] [2024-11-28 05:03:31,297 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:03:31,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:31,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:31,299 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:31,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 05:03:31,934 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:03:31,934 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:31,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 2998 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:03:31,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 85312 backedges. 14534 proven. 176 refuted. 0 times theorem prover too weak. 70602 trivial. 0 not checked. [2024-11-28 05:03:32,144 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 85312 backedges. 1032 proven. 6078 refuted. 0 times theorem prover too weak. 78202 trivial. 0 not checked. [2024-11-28 05:03:39,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482833399] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:39,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:39,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 19] total 26 [2024-11-28 05:03:39,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133451336] [2024-11-28 05:03:39,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:39,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:03:39,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:39,552 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:03:39,552 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:03:39,552 INFO L87 Difference]: Start difference. First operand 182 states and 284 transitions. Second operand has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 26 states have internal predecessors, (100), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 10 states have call predecessors, (35), 20 states have call successors, (35) [2024-11-28 05:03:40,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:03:40,155 INFO L93 Difference]: Finished difference Result 368 states and 650 transitions. [2024-11-28 05:03:40,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:03:40,156 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 26 states have internal predecessors, (100), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 10 states have call predecessors, (35), 20 states have call successors, (35) Word has length 1686 [2024-11-28 05:03:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:03:40,158 INFO L225 Difference]: With dead ends: 368 [2024-11-28 05:03:40,158 INFO L226 Difference]: Without dead ends: 183 [2024-11-28 05:03:40,161 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3406 GetRequests, 3356 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=1501, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 05:03:40,161 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 56 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:03:40,161 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 362 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:03:40,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-28 05:03:40,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 173. [2024-11-28 05:03:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 119 states have (on average 1.1008403361344539) internal successors, (131), 116 states have internal predecessors, (131), 30 states have call successors, (30), 19 states have call predecessors, (30), 23 states have return successors, (106), 37 states have call predecessors, (106), 30 states have call successors, (106) [2024-11-28 05:03:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 267 transitions. [2024-11-28 05:03:40,185 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 267 transitions. Word has length 1686 [2024-11-28 05:03:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:03:40,185 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 267 transitions. [2024-11-28 05:03:40,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 26 states have internal predecessors, (100), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 10 states have call predecessors, (35), 20 states have call successors, (35) [2024-11-28 05:03:40,186 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 267 transitions. [2024-11-28 05:03:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1747 [2024-11-28 05:03:40,210 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:03:40,211 INFO L218 NwaCegarLoop]: trace histogram [131, 131, 122, 122, 122, 102, 65, 65, 65, 65, 65, 65, 65, 61, 61, 61, 61, 61, 61, 61, 61, 37, 20, 9, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:40,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 05:03:40,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 05:03:40,411 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:03:40,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:40,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1013663934, now seen corresponding path program 11 times [2024-11-28 05:03:40,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:40,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445820527] [2024-11-28 05:03:40,413 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:03:40,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:40,459 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 05:03:40,460 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 91756 backedges. 1436 proven. 4508 refuted. 0 times theorem prover too weak. 85812 trivial. 0 not checked. [2024-11-28 05:03:40,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:40,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445820527] [2024-11-28 05:03:40,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445820527] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:40,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348056746] [2024-11-28 05:03:40,656 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:03:40,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:40,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:40,658 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:40,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 05:03:41,081 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 05:03:41,082 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:41,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 05:03:41,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 91756 backedges. 23437 proven. 32 refuted. 0 times theorem prover too weak. 68287 trivial. 0 not checked. [2024-11-28 05:03:41,193 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 91756 backedges. 1434 proven. 4510 refuted. 0 times theorem prover too weak. 85812 trivial. 0 not checked. [2024-11-28 05:03:47,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348056746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:47,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:47,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 18 [2024-11-28 05:03:47,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79615541] [2024-11-28 05:03:47,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:47,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:03:47,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:47,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:03:47,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:03:47,198 INFO L87 Difference]: Start difference. First operand 173 states and 267 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 11 states have call successors, (22), 2 states have call predecessors, (22), 7 states have return successors, (26), 8 states have call predecessors, (26), 11 states have call successors, (26) [2024-11-28 05:03:47,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:03:47,520 INFO L93 Difference]: Finished difference Result 348 states and 590 transitions. [2024-11-28 05:03:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:03:47,521 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 11 states have call successors, (22), 2 states have call predecessors, (22), 7 states have return successors, (26), 8 states have call predecessors, (26), 11 states have call successors, (26) Word has length 1746 [2024-11-28 05:03:47,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:03:47,524 INFO L225 Difference]: With dead ends: 348 [2024-11-28 05:03:47,524 INFO L226 Difference]: Without dead ends: 181 [2024-11-28 05:03:47,526 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3513 GetRequests, 3481 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:03:47,527 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:03:47,527 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 220 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:03:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-28 05:03:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2024-11-28 05:03:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 114 states have internal predecessors, (127), 30 states have call successors, (30), 18 states have call predecessors, (30), 23 states have return successors, (103), 37 states have call predecessors, (103), 30 states have call successors, (103) [2024-11-28 05:03:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 260 transitions. [2024-11-28 05:03:47,549 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 260 transitions. Word has length 1746 [2024-11-28 05:03:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:03:47,550 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 260 transitions. [2024-11-28 05:03:47,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 11 states have call successors, (22), 2 states have call predecessors, (22), 7 states have return successors, (26), 8 states have call predecessors, (26), 11 states have call successors, (26) [2024-11-28 05:03:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 260 transitions. [2024-11-28 05:03:47,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1391 [2024-11-28 05:03:47,567 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:03:47,567 INFO L218 NwaCegarLoop]: trace histogram [102, 102, 101, 101, 86, 82, 51, 51, 51, 51, 51, 51, 51, 50, 50, 50, 50, 50, 50, 50, 35, 32, 20, 15, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:47,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:47,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:47,772 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:03:47,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:47,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1394812369, now seen corresponding path program 12 times [2024-11-28 05:03:47,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:47,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388032382] [2024-11-28 05:03:47,773 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:03:47,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:47,826 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 05:03:47,827 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 57780 backedges. 787 proven. 2788 refuted. 0 times theorem prover too weak. 54205 trivial. 0 not checked. [2024-11-28 05:03:47,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:47,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388032382] [2024-11-28 05:03:47,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388032382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:47,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211249981] [2024-11-28 05:03:47,974 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:03:47,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:47,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:47,977 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:47,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 05:03:48,339 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 05:03:48,339 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:48,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:03:48,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 57780 backedges. 8221 proven. 4 refuted. 0 times theorem prover too weak. 49555 trivial. 0 not checked. [2024-11-28 05:03:48,414 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 57780 backedges. 769 proven. 2575 refuted. 0 times theorem prover too weak. 54436 trivial. 0 not checked. [2024-11-28 05:03:52,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211249981] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:52,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:52,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 13 [2024-11-28 05:03:52,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439502281] [2024-11-28 05:03:52,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:52,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 05:03:52,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:52,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 05:03:52,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:03:52,567 INFO L87 Difference]: Start difference. First operand 170 states and 260 transitions. Second operand has 13 states, 12 states have (on average 4.583333333333333) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-28 05:03:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:03:52,702 INFO L93 Difference]: Finished difference Result 333 states and 551 transitions. [2024-11-28 05:03:52,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:03:52,703 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.583333333333333) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 1390 [2024-11-28 05:03:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:03:52,705 INFO L225 Difference]: With dead ends: 333 [2024-11-28 05:03:52,706 INFO L226 Difference]: Without dead ends: 172 [2024-11-28 05:03:52,707 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2795 GetRequests, 2776 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:03:52,708 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:03:52,709 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 89 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:03:52,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-28 05:03:52,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2024-11-28 05:03:52,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 112 states have internal predecessors, (126), 29 states have call successors, (29), 21 states have call predecessors, (29), 21 states have return successors, (94), 34 states have call predecessors, (94), 29 states have call successors, (94) [2024-11-28 05:03:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 249 transitions. [2024-11-28 05:03:52,732 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 249 transitions. Word has length 1390 [2024-11-28 05:03:52,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:03:52,733 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 249 transitions. [2024-11-28 05:03:52,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.583333333333333) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-28 05:03:52,733 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 249 transitions. [2024-11-28 05:03:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2528 [2024-11-28 05:03:52,781 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:03:52,782 INFO L218 NwaCegarLoop]: trace histogram [197, 197, 174, 174, 159, 138, 98, 98, 98, 98, 98, 98, 98, 87, 87, 87, 87, 87, 87, 87, 72, 40, 38, 36, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:52,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 05:03:52,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:52,983 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:03:52,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:52,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2050786323, now seen corresponding path program 13 times [2024-11-28 05:03:52,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:52,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108456637] [2024-11-28 05:03:52,984 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:03:52,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:04:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 193418 backedges. 6216 proven. 8641 refuted. 0 times theorem prover too weak. 178561 trivial. 0 not checked. [2024-11-28 05:04:04,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:04,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108456637] [2024-11-28 05:04:04,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108456637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:04,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248165777] [2024-11-28 05:04:04,338 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:04:04,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:04,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:04,341 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:04,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 05:04:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:04:05,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 5631 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 05:04:05,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 193418 backedges. 1322 proven. 8760 refuted. 0 times theorem prover too weak. 183336 trivial. 0 not checked. [2024-11-28 05:04:05,833 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 193418 backedges. 1322 proven. 8816 refuted. 0 times theorem prover too weak. 183280 trivial. 0 not checked. [2024-11-28 05:04:18,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248165777] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:18,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:18,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15, 23] total 41 [2024-11-28 05:04:18,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068624990] [2024-11-28 05:04:18,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:18,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 05:04:18,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:18,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 05:04:18,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 05:04:18,108 INFO L87 Difference]: Start difference. First operand 168 states and 249 transitions. Second operand has 41 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 41 states have internal predecessors, (127), 34 states have call successors, (40), 1 states have call predecessors, (40), 21 states have return successors, (54), 22 states have call predecessors, (54), 34 states have call successors, (54) [2024-11-28 05:04:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:04:20,452 INFO L93 Difference]: Finished difference Result 514 states and 1127 transitions. [2024-11-28 05:04:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-28 05:04:20,453 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 41 states have internal predecessors, (127), 34 states have call successors, (40), 1 states have call predecessors, (40), 21 states have return successors, (54), 22 states have call predecessors, (54), 34 states have call successors, (54) Word has length 2527 [2024-11-28 05:04:20,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:04:20,459 INFO L225 Difference]: With dead ends: 514 [2024-11-28 05:04:20,459 INFO L226 Difference]: Without dead ends: 323 [2024-11-28 05:04:20,464 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5136 GetRequests, 5036 SyntacticMatches, 10 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1080, Invalid=7292, Unknown=0, NotChecked=0, Total=8372 [2024-11-28 05:04:20,465 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 202 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:04:20,465 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1033 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 05:04:20,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-28 05:04:20,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 261. [2024-11-28 05:04:20,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 181 states have (on average 1.0497237569060773) internal successors, (190), 176 states have internal predecessors, (190), 51 states have call successors, (51), 35 states have call predecessors, (51), 28 states have return successors, (168), 49 states have call predecessors, (168), 51 states have call successors, (168) [2024-11-28 05:04:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 409 transitions. [2024-11-28 05:04:20,505 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 409 transitions. Word has length 2527 [2024-11-28 05:04:20,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:04:20,506 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 409 transitions. [2024-11-28 05:04:20,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 41 states have internal predecessors, (127), 34 states have call successors, (40), 1 states have call predecessors, (40), 21 states have return successors, (54), 22 states have call predecessors, (54), 34 states have call successors, (54) [2024-11-28 05:04:20,506 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 409 transitions. [2024-11-28 05:04:20,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2042 [2024-11-28 05:04:20,538 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:04:20,539 INFO L218 NwaCegarLoop]: trace histogram [151, 151, 148, 148, 123, 120, 75, 75, 75, 75, 75, 75, 75, 74, 74, 74, 74, 74, 74, 74, 48, 46, 31, 25, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:20,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-28 05:04:20,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:20,740 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:04:20,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:20,740 INFO L85 PathProgramCache]: Analyzing trace with hash 90092925, now seen corresponding path program 14 times [2024-11-28 05:04:20,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:20,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214174258] [2024-11-28 05:04:20,740 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:04:20,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:21,308 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:04:21,308 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 125359 backedges. 1084 proven. 6209 refuted. 0 times theorem prover too weak. 118066 trivial. 0 not checked. [2024-11-28 05:04:25,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:25,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214174258] [2024-11-28 05:04:25,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214174258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:25,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015536562] [2024-11-28 05:04:25,378 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:04:25,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:25,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:25,380 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:25,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 05:04:26,231 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:04:26,231 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:26,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 4551 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 05:04:26,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 125359 backedges. 958 proven. 7961 refuted. 0 times theorem prover too weak. 116440 trivial. 0 not checked. [2024-11-28 05:04:26,482 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 125359 backedges. 958 proven. 8031 refuted. 0 times theorem prover too weak. 116370 trivial. 0 not checked. [2024-11-28 05:04:38,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015536562] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:38,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:38,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 25] total 34 [2024-11-28 05:04:38,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195814062] [2024-11-28 05:04:38,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:38,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:04:38,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:38,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:04:38,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:04:38,196 INFO L87 Difference]: Start difference. First operand 261 states and 409 transitions. Second operand has 34 states, 32 states have (on average 3.46875) internal successors, (111), 34 states have internal predecessors, (111), 30 states have call successors, (34), 1 states have call predecessors, (34), 18 states have return successors, (49), 19 states have call predecessors, (49), 30 states have call successors, (49) [2024-11-28 05:04:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:04:38,899 INFO L93 Difference]: Finished difference Result 303 states and 542 transitions. [2024-11-28 05:04:38,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 05:04:38,905 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 3.46875) internal successors, (111), 34 states have internal predecessors, (111), 30 states have call successors, (34), 1 states have call predecessors, (34), 18 states have return successors, (49), 19 states have call predecessors, (49), 30 states have call successors, (49) Word has length 2041 [2024-11-28 05:04:38,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:04:38,912 INFO L225 Difference]: With dead ends: 303 [2024-11-28 05:04:38,912 INFO L226 Difference]: Without dead ends: 299 [2024-11-28 05:04:38,913 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4117 GetRequests, 4058 SyntacticMatches, 11 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=453, Invalid=1997, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 05:04:38,915 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 90 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:04:38,916 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 307 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:04:38,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-11-28 05:04:38,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 291. [2024-11-28 05:04:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 199 states have (on average 1.0452261306532664) internal successors, (208), 194 states have internal predecessors, (208), 57 states have call successors, (57), 35 states have call predecessors, (57), 34 states have return successors, (236), 61 states have call predecessors, (236), 57 states have call successors, (236) [2024-11-28 05:04:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 501 transitions. [2024-11-28 05:04:38,955 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 501 transitions. Word has length 2041 [2024-11-28 05:04:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:04:38,957 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 501 transitions. [2024-11-28 05:04:38,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 3.46875) internal successors, (111), 34 states have internal predecessors, (111), 30 states have call successors, (34), 1 states have call predecessors, (34), 18 states have return successors, (49), 19 states have call predecessors, (49), 30 states have call successors, (49) [2024-11-28 05:04:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 501 transitions. [2024-11-28 05:04:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3702 [2024-11-28 05:04:39,048 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:04:39,049 INFO L218 NwaCegarLoop]: trace histogram [275, 275, 268, 268, 221, 218, 137, 137, 137, 137, 137, 137, 137, 134, 134, 134, 134, 134, 134, 134, 87, 81, 54, 50, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:39,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 05:04:39,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 05:04:39,250 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:04:39,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:39,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1517047411, now seen corresponding path program 15 times [2024-11-28 05:04:39,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:39,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630572248] [2024-11-28 05:04:39,252 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:04:39,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:39,515 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2024-11-28 05:04:39,515 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 414683 backedges. 1843 proven. 16124 refuted. 0 times theorem prover too weak. 396716 trivial. 0 not checked. [2024-11-28 05:04:40,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:40,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630572248] [2024-11-28 05:04:40,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630572248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:40,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098971477] [2024-11-28 05:04:40,476 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:04:40,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:40,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:40,478 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:40,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 05:04:41,408 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2024-11-28 05:04:41,408 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:41,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 1559 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 05:04:41,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 414683 backedges. 1843 proven. 16124 refuted. 0 times theorem prover too weak. 396716 trivial. 0 not checked. [2024-11-28 05:04:41,641 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 414683 backedges. 1843 proven. 16209 refuted. 0 times theorem prover too weak. 396631 trivial. 0 not checked. [2024-11-28 05:05:01,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098971477] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:01,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:01,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 27] total 30 [2024-11-28 05:05:01,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858146074] [2024-11-28 05:05:01,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:01,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:05:01,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:01,609 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:05:01,609 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:05:01,609 INFO L87 Difference]: Start difference. First operand 291 states and 501 transitions. Second operand has 30 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 30 states have internal predecessors, (99), 27 states have call successors, (30), 1 states have call predecessors, (30), 13 states have return successors, (39), 13 states have call predecessors, (39), 27 states have call successors, (39) [2024-11-28 05:05:02,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:05:02,071 INFO L93 Difference]: Finished difference Result 324 states and 629 transitions. [2024-11-28 05:05:02,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:05:02,072 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 30 states have internal predecessors, (99), 27 states have call successors, (30), 1 states have call predecessors, (30), 13 states have return successors, (39), 13 states have call predecessors, (39), 27 states have call successors, (39) Word has length 3701 [2024-11-28 05:05:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:05:02,081 INFO L225 Difference]: With dead ends: 324 [2024-11-28 05:05:02,081 INFO L226 Difference]: Without dead ends: 320 [2024-11-28 05:05:02,082 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7438 GetRequests, 7387 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=1338, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 05:05:02,082 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:05:02,083 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 312 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:05:02,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-11-28 05:05:02,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 284. [2024-11-28 05:05:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 195 states have (on average 1.0461538461538462) internal successors, (204), 190 states have internal predecessors, (204), 55 states have call successors, (55), 35 states have call predecessors, (55), 33 states have return successors, (226), 58 states have call predecessors, (226), 55 states have call successors, (226) [2024-11-28 05:05:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 485 transitions. [2024-11-28 05:05:02,125 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 485 transitions. Word has length 3701 [2024-11-28 05:05:02,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:05:02,127 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 485 transitions. [2024-11-28 05:05:02,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 30 states have internal predecessors, (99), 27 states have call successors, (30), 1 states have call predecessors, (30), 13 states have return successors, (39), 13 states have call predecessors, (39), 27 states have call successors, (39) [2024-11-28 05:05:02,128 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 485 transitions. [2024-11-28 05:05:02,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5896 [2024-11-28 05:05:02,418 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:05:02,419 INFO L218 NwaCegarLoop]: trace histogram [433, 433, 432, 432, 355, 346, 216, 216, 216, 216, 216, 216, 216, 216, 216, 216, 216, 216, 216, 216, 139, 130, 87, 77, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:02,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 05:05:02,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-28 05:05:02,619 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:05:02,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:02,621 INFO L85 PathProgramCache]: Analyzing trace with hash -427738902, now seen corresponding path program 16 times [2024-11-28 05:05:02,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:02,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117858485] [2024-11-28 05:05:02,622 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:05:02,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:04,185 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:05:04,185 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1054776 backedges. 3729 proven. 24693 refuted. 0 times theorem prover too weak. 1026354 trivial. 0 not checked. [2024-11-28 05:05:24,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:24,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117858485] [2024-11-28 05:05:24,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117858485] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:24,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974838357] [2024-11-28 05:05:24,628 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:05:24,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:24,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:24,629 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:24,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 05:05:26,848 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:05:26,848 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:26,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 10489 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:05:26,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1054776 backedges. 58300 proven. 176 refuted. 0 times theorem prover too weak. 996300 trivial. 0 not checked. [2024-11-28 05:05:27,130 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1054776 backedges. 3730 proven. 26314 refuted. 0 times theorem prover too weak. 1024732 trivial. 0 not checked. [2024-11-28 05:05:51,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974838357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:51,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:51,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 19] total 26 [2024-11-28 05:05:51,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363739259] [2024-11-28 05:05:51,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:51,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:05:51,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:51,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:05:51,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:05:51,608 INFO L87 Difference]: Start difference. First operand 284 states and 485 transitions. Second operand has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 26 states have internal predecessors, (100), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 10 states have call predecessors, (35), 20 states have call successors, (35) [2024-11-28 05:05:52,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:05:52,361 INFO L93 Difference]: Finished difference Result 571 states and 1087 transitions. [2024-11-28 05:05:52,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 05:05:52,362 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 26 states have internal predecessors, (100), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 10 states have call predecessors, (35), 20 states have call successors, (35) Word has length 5895 [2024-11-28 05:05:52,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:05:52,367 INFO L225 Difference]: With dead ends: 571 [2024-11-28 05:05:52,367 INFO L226 Difference]: Without dead ends: 298 [2024-11-28 05:05:52,370 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11823 GetRequests, 11774 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 05:05:52,372 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 54 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:05:52,372 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 364 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:05:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-11-28 05:05:52,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 267. [2024-11-28 05:05:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 185 states have (on average 1.0432432432432432) internal successors, (193), 180 states have internal predecessors, (193), 52 states have call successors, (52), 35 states have call predecessors, (52), 29 states have return successors, (185), 51 states have call predecessors, (185), 52 states have call successors, (185) [2024-11-28 05:05:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 430 transitions. [2024-11-28 05:05:52,416 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 430 transitions. Word has length 5895 [2024-11-28 05:05:52,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:05:52,417 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 430 transitions. [2024-11-28 05:05:52,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 26 states have internal predecessors, (100), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 10 states have call predecessors, (35), 20 states have call successors, (35) [2024-11-28 05:05:52,417 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 430 transitions. [2024-11-28 05:05:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9558 [2024-11-28 05:05:53,067 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:05:53,070 INFO L218 NwaCegarLoop]: trace histogram [707, 707, 696, 696, 577, 558, 353, 353, 353, 353, 353, 353, 353, 348, 348, 348, 348, 348, 348, 348, 229, 205, 138, 130, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:53,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 05:05:53,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 05:05:53,270 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:05:53,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:53,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1072297487, now seen corresponding path program 17 times [2024-11-28 05:05:53,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:53,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009722639] [2024-11-28 05:05:53,273 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:05:53,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:53,595 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2024-11-28 05:05:53,595 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2777327 backedges. 9467 proven. 51505 refuted. 0 times theorem prover too weak. 2716355 trivial. 0 not checked. [2024-11-28 05:05:54,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:54,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009722639] [2024-11-28 05:05:54,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009722639] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:54,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368981963] [2024-11-28 05:05:54,723 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:05:54,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:54,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:54,727 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:54,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 05:05:56,405 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2024-11-28 05:05:56,405 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:56,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 05:05:56,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2777327 backedges. 651411 proven. 1897 refuted. 0 times theorem prover too weak. 2124019 trivial. 0 not checked. [2024-11-28 05:05:57,089 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:06:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2777327 backedges. 10118 proven. 57533 refuted. 0 times theorem prover too weak. 2709676 trivial. 0 not checked. [2024-11-28 05:06:49,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368981963] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:06:49,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:06:49,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 31] total 41 [2024-11-28 05:06:49,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785827885] [2024-11-28 05:06:49,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:06:49,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 05:06:49,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:06:49,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 05:06:49,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 05:06:49,276 INFO L87 Difference]: Start difference. First operand 267 states and 430 transitions. Second operand has 41 states, 40 states have (on average 3.575) internal successors, (143), 41 states have internal predecessors, (143), 35 states have call successors, (45), 2 states have call predecessors, (45), 17 states have return successors, (58), 18 states have call predecessors, (58), 35 states have call successors, (58) [2024-11-28 05:06:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:06:51,314 INFO L93 Difference]: Finished difference Result 603 states and 1062 transitions. [2024-11-28 05:06:51,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-28 05:06:51,315 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.575) internal successors, (143), 41 states have internal predecessors, (143), 35 states have call successors, (45), 2 states have call predecessors, (45), 17 states have return successors, (58), 18 states have call predecessors, (58), 35 states have call successors, (58) Word has length 9557 [2024-11-28 05:06:51,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:06:51,321 INFO L225 Difference]: With dead ends: 603 [2024-11-28 05:06:51,322 INFO L226 Difference]: Without dead ends: 343 [2024-11-28 05:06:51,327 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19182 GetRequests, 19088 SyntacticMatches, 15 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=959, Invalid=5521, Unknown=0, NotChecked=0, Total=6480 [2024-11-28 05:06:51,328 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 175 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:06:51,328 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 700 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 05:06:51,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-11-28 05:06:51,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 289. [2024-11-28 05:06:51,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 203 states have (on average 1.0443349753694582) internal successors, (212), 198 states have internal predecessors, (212), 58 states have call successors, (58), 43 states have call predecessors, (58), 27 states have return successors, (172), 47 states have call predecessors, (172), 58 states have call successors, (172) [2024-11-28 05:06:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 442 transitions. [2024-11-28 05:06:51,380 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 442 transitions. Word has length 9557 [2024-11-28 05:06:51,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:06:51,382 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 442 transitions. [2024-11-28 05:06:51,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.575) internal successors, (143), 41 states have internal predecessors, (143), 35 states have call successors, (45), 2 states have call predecessors, (45), 17 states have return successors, (58), 18 states have call predecessors, (58), 35 states have call successors, (58) [2024-11-28 05:06:51,383 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 442 transitions. [2024-11-28 05:06:51,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5132 [2024-11-28 05:06:51,589 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:06:51,590 INFO L218 NwaCegarLoop]: trace histogram [379, 379, 374, 374, 308, 301, 189, 189, 189, 189, 189, 189, 189, 187, 187, 187, 187, 187, 187, 187, 121, 112, 73, 71, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:06:51,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 05:06:51,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 05:06:51,791 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:06:51,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:06:51,792 INFO L85 PathProgramCache]: Analyzing trace with hash -910256446, now seen corresponding path program 18 times [2024-11-28 05:06:51,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:06:51,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090123825] [2024-11-28 05:06:51,793 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:06:51,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:06:51,989 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-11-28 05:06:51,989 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 798584 backedges. 3209 proven. 17617 refuted. 0 times theorem prover too weak. 777758 trivial. 0 not checked. [2024-11-28 05:06:52,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:06:52,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090123825] [2024-11-28 05:06:52,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090123825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:06:52,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127360740] [2024-11-28 05:06:52,830 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:06:52,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:52,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:06:52,833 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:06:52,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 05:06:54,210 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-11-28 05:06:54,210 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:54,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 05:06:54,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:06:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 798584 backedges. 3209 proven. 17617 refuted. 0 times theorem prover too weak. 777758 trivial. 0 not checked. [2024-11-28 05:06:54,557 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:07:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 798584 backedges. 3211 proven. 17673 refuted. 0 times theorem prover too weak. 777700 trivial. 0 not checked. [2024-11-28 05:07:20,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127360740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:07:20,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:07:20,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 23] total 26 [2024-11-28 05:07:20,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285303289] [2024-11-28 05:07:20,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:07:20,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:07:20,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:07:20,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:07:20,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:07:20,539 INFO L87 Difference]: Start difference. First operand 289 states and 442 transitions. Second operand has 26 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 26 states have internal predecessors, (88), 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 05:07:20,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:07:20,961 INFO L93 Difference]: Finished difference Result 329 states and 596 transitions. [2024-11-28 05:07:20,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:07:20,961 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 26 states have internal predecessors, (88), 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 5131 [2024-11-28 05:07:20,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:07:20,974 INFO L225 Difference]: With dead ends: 329 [2024-11-28 05:07:20,974 INFO L226 Difference]: Without dead ends: 325 [2024-11-28 05:07:20,975 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10292 GetRequests, 10249 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 05:07:20,976 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:07:20,976 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 234 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:07:20,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-11-28 05:07:21,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 299. [2024-11-28 05:07:21,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 209 states have (on average 1.0430622009569377) internal successors, (218), 204 states have internal predecessors, (218), 60 states have call successors, (60), 43 states have call predecessors, (60), 29 states have return successors, (198), 51 states have call predecessors, (198), 60 states have call successors, (198) [2024-11-28 05:07:21,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 476 transitions. [2024-11-28 05:07:21,028 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 476 transitions. Word has length 5131 [2024-11-28 05:07:21,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:07:21,029 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 476 transitions. [2024-11-28 05:07:21,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 26 states have internal predecessors, (88), 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 05:07:21,030 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 476 transitions. [2024-11-28 05:07:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5936 [2024-11-28 05:07:21,252 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:07:21,253 INFO L218 NwaCegarLoop]: trace histogram [436, 436, 435, 435, 355, 350, 218, 218, 218, 218, 218, 218, 218, 217, 217, 217, 217, 217, 217, 217, 137, 133, 86, 80, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:07:21,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-28 05:07:21,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 05:07:21,453 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:07:21,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:07:21,455 INFO L85 PathProgramCache]: Analyzing trace with hash 370203677, now seen corresponding path program 19 times [2024-11-28 05:07:21,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:07:21,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902683069] [2024-11-28 05:07:21,456 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:07:21,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:07:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1069166 backedges. 4164 proven. 22452 refuted. 0 times theorem prover too weak. 1042550 trivial. 0 not checked. [2024-11-28 05:08:03,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:03,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902683069] [2024-11-28 05:08:03,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902683069] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:03,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099413789] [2024-11-28 05:08:03,813 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:08:03,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:03,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:03,816 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:03,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 05:08:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:06,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 13197 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 05:08:06,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1069166 backedges. 3652 proven. 27890 refuted. 0 times theorem prover too weak. 1037624 trivial. 0 not checked. [2024-11-28 05:08:07,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1069166 backedges. 3652 proven. 27992 refuted. 0 times theorem prover too weak. 1037522 trivial. 0 not checked. [2024-11-28 05:08:44,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099413789] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:44,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:44,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 29] total 38 [2024-11-28 05:08:44,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465182796] [2024-11-28 05:08:44,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:44,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-28 05:08:44,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:44,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-28 05:08:44,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 05:08:44,614 INFO L87 Difference]: Start difference. First operand 299 states and 476 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 05:08:45,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:45,457 INFO L93 Difference]: Finished difference Result 341 states and 659 transitions. [2024-11-28 05:08:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:08:45,457 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 5935 [2024-11-28 05:08:45,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:45,471 INFO L225 Difference]: With dead ends: 341 [2024-11-28 05:08:45,471 INFO L226 Difference]: Without dead ends: 337 [2024-11-28 05:08:45,473 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11911 GetRequests, 11844 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=2518, Unknown=0, NotChecked=0, Total=3080 [2024-11-28 05:08:45,473 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 194 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:45,474 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 295 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:08:45,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2024-11-28 05:08:45,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 309. [2024-11-28 05:08:45,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 215 states have (on average 1.041860465116279) internal successors, (224), 210 states have internal predecessors, (224), 62 states have call successors, (62), 43 states have call predecessors, (62), 31 states have return successors, (228), 55 states have call predecessors, (228), 62 states have call successors, (228) [2024-11-28 05:08:45,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 514 transitions. [2024-11-28 05:08:45,532 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 514 transitions. Word has length 5935 [2024-11-28 05:08:45,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:45,533 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 514 transitions. [2024-11-28 05:08:45,534 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 05:08:45,534 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 514 transitions. [2024-11-28 05:08:46,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12214 [2024-11-28 05:08:46,809 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:46,811 INFO L218 NwaCegarLoop]: trace histogram [897, 897, 896, 896, 731, 720, 448, 448, 448, 448, 448, 448, 448, 448, 448, 448, 448, 448, 448, 448, 283, 272, 176, 166, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:46,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 05:08:47,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 05:08:47,012 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:08:47,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:47,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1188996232, now seen corresponding path program 20 times [2024-11-28 05:08:47,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:47,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612265544] [2024-11-28 05:08:47,017 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:08:47,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:00,269 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:09:00,270 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4537943 backedges. 5854 proven. 64712 refuted. 0 times theorem prover too weak. 4467377 trivial. 0 not checked. [2024-11-28 05:12:06,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:06,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612265544] [2024-11-28 05:12:06,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612265544] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:06,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076500269] [2024-11-28 05:12:06,771 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:12:06,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:06,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:06,772 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:06,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 05:12:11,361 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:12:11,361 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:11,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 27136 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 05:12:11,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4537943 backedges. 5854 proven. 64712 refuted. 0 times theorem prover too weak. 4467377 trivial. 0 not checked. [2024-11-28 05:12:12,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4537943 backedges. 5854 proven. 64832 refuted. 0 times theorem prover too weak. 4467257 trivial. 0 not checked. [2024-11-28 05:13:08,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076500269] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:13:08,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:13:08,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 31] total 34 [2024-11-28 05:13:08,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010520153] [2024-11-28 05:13:08,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:08,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:13:08,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:08,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:13:08,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:13:08,716 INFO L87 Difference]: Start difference. First operand 309 states and 514 transitions. Second operand has 34 states, 32 states have (on average 3.46875) internal successors, (111), 34 states have internal predecessors, (111), 31 states have call successors, (34), 1 states have call predecessors, (34), 15 states have return successors, (45), 15 states have call predecessors, (45), 31 states have call successors, (45) [2024-11-28 05:13:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:13:09,230 INFO L93 Difference]: Finished difference Result 362 states and 766 transitions. [2024-11-28 05:13:09,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:13:09,231 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 3.46875) internal successors, (111), 34 states have internal predecessors, (111), 31 states have call successors, (34), 1 states have call predecessors, (34), 15 states have return successors, (45), 15 states have call predecessors, (45), 31 states have call successors, (45) Word has length 12213 [2024-11-28 05:13:09,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:13:09,245 INFO L225 Difference]: With dead ends: 362 [2024-11-28 05:13:09,245 INFO L226 Difference]: Without dead ends: 358 [2024-11-28 05:13:09,247 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24468 GetRequests, 24409 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 05:13:09,247 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 156 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:13:09,247 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 308 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:13:09,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-11-28 05:13:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 312. [2024-11-28 05:13:09,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 217 states have (on average 1.0414746543778801) internal successors, (226), 212 states have internal predecessors, (226), 62 states have call successors, (62), 43 states have call predecessors, (62), 32 states have return successors, (237), 56 states have call predecessors, (237), 62 states have call successors, (237) [2024-11-28 05:13:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 525 transitions. [2024-11-28 05:13:09,297 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 525 transitions. Word has length 12213 [2024-11-28 05:13:09,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:13:09,299 INFO L471 AbstractCegarLoop]: Abstraction has 312 states and 525 transitions. [2024-11-28 05:13:09,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 3.46875) internal successors, (111), 34 states have internal predecessors, (111), 31 states have call successors, (34), 1 states have call predecessors, (34), 15 states have return successors, (45), 15 states have call predecessors, (45), 31 states have call successors, (45) [2024-11-28 05:13:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 525 transitions. [2024-11-28 05:13:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15604 [2024-11-28 05:13:10,599 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:13:10,601 INFO L218 NwaCegarLoop]: trace histogram [1157, 1157, 1134, 1134, 935, 918, 578, 578, 578, 578, 578, 578, 578, 567, 567, 567, 567, 567, 567, 567, 368, 340, 222, 216, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:10,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 05:13:10,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 05:13:10,801 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:13:10,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:10,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1794576269, now seen corresponding path program 21 times [2024-11-28 05:13:10,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:10,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437837288] [2024-11-28 05:13:10,806 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:13:10,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:11,263 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2024-11-28 05:13:11,266 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7411032 backedges. 9089 proven. 87839 refuted. 0 times theorem prover too weak. 7314104 trivial. 0 not checked. [2024-11-28 05:13:14,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:14,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437837288] [2024-11-28 05:13:14,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437837288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:14,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475646882] [2024-11-28 05:13:14,249 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:13:14,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:14,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:14,251 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:14,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 05:13:16,634 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2024-11-28 05:13:16,634 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:16,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 2161 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 05:13:16,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7411032 backedges. 9089 proven. 87839 refuted. 0 times theorem prover too weak. 7314104 trivial. 0 not checked. [2024-11-28 05:13:17,272 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:14:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7411032 backedges. 9089 proven. 87979 refuted. 0 times theorem prover too weak. 7313964 trivial. 0 not checked. [2024-11-28 05:14:34,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475646882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:14:34,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:14:34,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 33] total 36 [2024-11-28 05:14:34,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129051863] [2024-11-28 05:14:34,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:14:34,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 05:14:34,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:14:34,226 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 05:14:34,226 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 05:14:34,226 INFO L87 Difference]: Start difference. First operand 312 states and 525 transitions. Second operand has 36 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 36 states have internal predecessors, (117), 33 states have call successors, (36), 1 states have call predecessors, (36), 16 states have return successors, (48), 16 states have call predecessors, (48), 33 states have call successors, (48) [2024-11-28 05:14:34,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:14:34,869 INFO L93 Difference]: Finished difference Result 355 states and 721 transitions. [2024-11-28 05:14:34,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:14:34,870 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 36 states have internal predecessors, (117), 33 states have call successors, (36), 1 states have call predecessors, (36), 16 states have return successors, (48), 16 states have call predecessors, (48), 33 states have call successors, (48) Word has length 15603 [2024-11-28 05:14:34,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:14:34,890 INFO L225 Difference]: With dead ends: 355 [2024-11-28 05:14:34,891 INFO L226 Difference]: Without dead ends: 351 [2024-11-28 05:14:34,892 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31251 GetRequests, 31188 SyntacticMatches, 15 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=443, Invalid=2007, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 05:14:34,893 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:14:34,893 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 295 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:14:34,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2024-11-28 05:14:34,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 305. [2024-11-28 05:14:34,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 213 states have (on average 1.0422535211267605) internal successors, (222), 208 states have internal predecessors, (222), 60 states have call successors, (60), 43 states have call predecessors, (60), 31 states have return successors, (215), 53 states have call predecessors, (215), 60 states have call successors, (215) [2024-11-28 05:14:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 497 transitions. [2024-11-28 05:14:34,946 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 497 transitions. Word has length 15603 [2024-11-28 05:14:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:14:34,948 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 497 transitions. [2024-11-28 05:14:34,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 36 states have internal predecessors, (117), 33 states have call successors, (36), 1 states have call predecessors, (36), 16 states have return successors, (48), 16 states have call predecessors, (48), 33 states have call successors, (48) [2024-11-28 05:14:34,949 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 497 transitions. [2024-11-28 05:14:39,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25560 [2024-11-28 05:14:39,774 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:14:39,777 INFO L218 NwaCegarLoop]: trace histogram [1886, 1886, 1867, 1867, 1525, 1512, 943, 943, 943, 943, 943, 943, 943, 933, 933, 933, 933, 933, 933, 933, 582, 579, 374, 342, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:14:39,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 05:14:39,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0783ab5-c0da-4c0f-a5c0-27e905bd36b2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 05:14:39,978 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:14:39,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:14:39,985 INFO L85 PathProgramCache]: Analyzing trace with hash -118151590, now seen corresponding path program 22 times [2024-11-28 05:14:39,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:14:39,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76218506] [2024-11-28 05:14:39,986 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:14:39,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:12,690 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:15:12,690 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat